commit 8fd8d9708c4200b894356877df605b6db1f1663b
Author: Ruben Ramirez <ruben@redlotusaustin.com>
Date:   Mon Jun 30 21:56:49 2025 -0400

    Initial commit: Complete Event Tickets Mail-In Payment Gateway
    
    - Complete mail-in payment gateway for Event Tickets Commerce
    - Support for check payments with collapsible checkout interface
    - Admin interface for managing check payments and order status
    - Professional asset organization with proper WordPress enqueuing
    - Order management with status tracking (pending, received, bounced)
    - Template system with responsive design and accessibility features
    - Integration with Event Tickets Commerce order system
    - Settings page for configuring payment instructions and addresses

diff --git a/README.md b/README.md
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--- /dev/null
+++ b/README.md
@@ -0,0 +1,221 @@
+# Event Tickets - Mail-In Payment Gateway
+
+A complementary WordPress plugin that adds a mail-in payment gateway for Event Tickets Commerce, allowing customers to pay by mailing checks.
+
+## Description
+
+This plugin extends the Event Tickets plugin by adding a "Mail-In Payment (Check)" gateway that allows customers to reserve tickets and pay by mailing a check. It provides comprehensive order management features for administrators to track and process check payments.
+
+## Features
+
+- **Check Payment Gateway**: Seamlessly integrates with Event Tickets Commerce
+- **Order Management**: Admin interface to track pending check payments
+- **Email Notifications**: Automated emails for payment instructions, confirmations, and cancellations
+- **Customizable Settings**: Configure mailing address, payment instructions, and reservation periods
+- **Order Tracking**: Track check received status, bounce handling, and order notes
+- **Auto-Cancellation**: Optional automatic cancellation of expired orders
+- **Template System**: Customizable checkout and email templates
+
+## Requirements
+
+- WordPress 6.6 or higher
+- PHP 7.4 or higher
+- Event Tickets plugin (with Commerce module)
+- The Events Calendar plugin (recommended)
+
+## Installation
+
+1. Download the plugin files
+2. Upload the `event-tickets-mail-in-payment` folder to `/wp-content/plugins/`
+3. Activate the plugin through the 'Plugins' menu in WordPress
+4. Configure the gateway settings under **Tickets > Settings > Payments**
+
+## Configuration
+
+### Basic Setup
+
+1. Navigate to **Tickets > Settings > Payments**
+2. Find the "Mail-In Payment (Check) Settings" section
+3. Configure the required settings:
+   - **Enable Mail-In Payments**: Check to activate the gateway
+   - **Make Check Payable To**: Organization or person name for checks
+   - **Mailing Address**: Complete address where checks should be sent
+   - **Payment Instructions**: Custom instructions for customers
+
+### Advanced Settings
+
+- **Payment Method Title**: Customize the gateway name shown to customers
+- **Payment Method Description**: Brief description shown during checkout
+- **Reservation Period**: Number of days to hold tickets while awaiting payment
+- **Auto-Cancel Expired Orders**: Automatically cancel orders after reservation period
+
+## Order Management
+
+### Admin Interface
+
+Access mail-in payment management through:
+- **Tickets > Orders > Mail-In Payments** - Dedicated management page
+- Individual order edit screens include mail-in payment details
+
+### Order Processing
+
+1. **Pending Orders**: Orders awaiting check payment appear in the management interface
+2. **Mark as Received**: When a check arrives, mark it as received with optional notes
+3. **Mark as Bounced**: Handle returned/bounced checks with reason tracking
+4. **Automatic Emails**: System sends confirmation emails when status changes
+
+### Order Statuses
+
+- **Pending/Approved**: Order created, awaiting check payment
+- **Completed**: Check received and processed
+- **Denied**: Check bounced or order manually cancelled
+
+## Templates
+
+### Customization
+
+Templates can be overridden by copying them to your theme:
+
+```
+wp-content/themes/[your-theme]/event-tickets-mail-in/
+├── checkout/
+│   └── mail-in-form.php
+├── emails/
+│   ├── payment-instructions.php
+│   ├── payment-confirmation.php
+│   └── order-cancelled.php
+└── admin/
+    ├── mail-in-orders.php
+    └── order-meta-box.php
+```
+
+### Available Templates
+
+- **Checkout Form**: `checkout/mail-in-form.php` - Payment method display during checkout
+- **Email Templates**: Complete HTML email templates for all notifications
+- **Admin Templates**: Management interface templates
+
+## Hooks and Filters
+
+### Actions
+
+```php
+// Triggered when a check is marked as received
+do_action( 'et_mail_in_check_received', $order_id, $notes );
+
+// Triggered when a check is marked as bounced
+do_action( 'et_mail_in_check_bounced', $order_id, $reason );
+
+// Daily cleanup of expired orders
+do_action( 'et_mail_in_cleanup_expired_orders' );
+```
+
+### Filters
+
+```php
+// Customize payment instructions
+add_filter( 'et_mail_in_payment_instructions', function( $instructions, $order ) {
+    return $instructions;
+}, 10, 2 );
+
+// Modify email content
+add_filter( 'et_mail_in_email_content', function( $content, $template, $order ) {
+    return $content;
+}, 10, 3 );
+
+// Customize reservation period per order
+add_filter( 'et_mail_in_reservation_days', function( $days, $order ) {
+    return $days;
+}, 10, 2 );
+```
+
+## Email System
+
+### Automated Emails
+
+1. **Payment Instructions**: Sent when order is created
+2. **Payment Confirmation**: Sent when check is marked as received
+3. **Order Cancellation**: Sent when order is cancelled or expires
+
+### Email Customization
+
+- HTML templates with responsive design
+- Includes order details, payment instructions, and mailing address
+- Uses WordPress mail system with customizable headers
+
+## Security Features
+
+- **Nonce Verification**: All admin actions are protected with WordPress nonces
+- **Capability Checks**: Admin functions require appropriate user permissions
+- **Data Sanitization**: All user inputs are properly sanitized
+- **Order Validation**: Prevents unauthorized access to order data
+
+## Development
+
+### File Structure
+
+```
+event-tickets-mail-in-payment/
+├── event-tickets-mail-in-payment.php  # Main plugin file
+├── src/                               # Core classes
+│   ├── Gateway.php                   # Payment gateway implementation
+│   ├── Order.php                     # Order management
+│   ├── Settings.php                  # Configuration handling
+│   ├── Provider.php                  # Service provider
+│   └── Hooks.php                     # WordPress hooks
+├── templates/                         # Template files
+│   ├── checkout/                     # Frontend templates
+│   ├── emails/                       # Email templates
+│   └── admin/                        # Admin interface templates
+└── README.md                         # Documentation
+```
+
+### Extending the Plugin
+
+The plugin is built with extensibility in mind:
+
+- PSR-4 autoloading with namespace `ET_Mail_In_Payment`
+- Service provider pattern for modular functionality
+- Hook system for customization
+- Template override system
+
+## Troubleshooting
+
+### Common Issues
+
+1. **Gateway Not Appearing**: Ensure Event Tickets plugin is active and Commerce module is enabled
+2. **Settings Not Saving**: Check file permissions and WordPress error logs
+3. **Emails Not Sending**: Verify WordPress mail configuration
+4. **Template Issues**: Clear any caching plugins after template changes
+
+### Debug Mode
+
+Enable WordPress debug mode to see detailed error messages:
+
+```php
+define( 'WP_DEBUG', true );
+define( 'WP_DEBUG_LOG', true );
+```
+
+## Support
+
+For support and questions:
+
+1. Check the plugin settings and this documentation
+2. Review WordPress error logs for any issues
+3. Ensure all requirements are met
+4. Contact the plugin developer for technical support
+
+## License
+
+This plugin is licensed under the GPL v2 or later.
+
+## Changelog
+
+### 1.0.0
+- Initial release
+- Mail-in payment gateway implementation
+- Order management interface
+- Email notification system
+- Template system
+- Settings configuration
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diff --git a/assets/css/admin.css b/assets/css/admin.css
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+++ b/assets/css/admin.css
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+/**
+ * Mail-In Payment Gateway Admin Styles
+ * @since 1.0.0
+ */
+
+.et-mail-in-admin-page {
+	max-width: 1200px;
+	margin: 20px 0;
+}
+
+.et-mail-in-orders-table {
+	width: 100%;
+	border-collapse: collapse;
+	margin-top: 20px;
+}
+
+.et-mail-in-orders-table th,
+.et-mail-in-orders-table td {
+	padding: 12px;
+	text-align: left;
+	border-bottom: 1px solid #ddd;
+}
+
+.et-mail-in-orders-table th {
+	background-color: #f1f1f1;
+	font-weight: bold;
+}
+
+.et-mail-in-status {
+	padding: 4px 8px;
+	border-radius: 3px;
+	font-size: 12px;
+	font-weight: bold;
+	text-transform: uppercase;
+}
+
+.et-mail-in-status--pending {
+	background-color: #fff3cd;
+	color: #856404;
+	border: 1px solid #ffeaa7;
+}
+
+.et-mail-in-status--received {
+	background-color: #d4edda;
+	color: #155724;
+	border: 1px solid #c3e6cb;
+}
+
+.et-mail-in-status--bounced {
+	background-color: #f8d7da;
+	color: #721c24;
+	border: 1px solid #f5c6cb;
+}
+
+.et-mail-in-action-buttons {
+	display: flex;
+	gap: 8px;
+	flex-wrap: wrap;
+}
+
+.et-mail-in-action-button {
+	padding: 6px 12px;
+	border: none;
+	border-radius: 3px;
+	cursor: pointer;
+	font-size: 12px;
+	text-decoration: none;
+	display: inline-block;
+	transition: background-color 0.2s;
+}
+
+.et-mail-in-action-button--primary {
+	background-color: #0073aa;
+	color: white;
+}
+
+.et-mail-in-action-button--primary:hover {
+	background-color: #005a87;
+}
+
+.et-mail-in-action-button--danger {
+	background-color: #dc3545;
+	color: white;
+}
+
+.et-mail-in-action-button--danger:hover {
+	background-color: #c82333;
+}
+
+.et-mail-in-meta-box {
+	background: #fff;
+	border: 1px solid #ccd0d4;
+	border-radius: 4px;
+	padding: 20px;
+	margin-bottom: 20px;
+}
+
+.et-mail-in-meta-row {
+	display: flex;
+	margin-bottom: 12px;
+	align-items: center;
+}
+
+.et-mail-in-meta-label {
+	font-weight: bold;
+	min-width: 150px;
+	color: #23282d;
+}
+
+.et-mail-in-meta-value {
+	flex: 1;
+	color: #32373c;
+}
+
+.et-mail-in-address-block {
+	background: #f9f9f9;
+	padding: 10px;
+	border-left: 3px solid #0073aa;
+	font-family: monospace;
+	white-space: pre-line;
+	border-radius: 0 3px 3px 0;
+}
\ No newline at end of file
diff --git a/assets/css/checkout.css b/assets/css/checkout.css
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--- /dev/null
+++ b/assets/css/checkout.css
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+/**
+ * Mail-In Payment Gateway Checkout Styles
+ * @since 1.0.0
+ */
+
+.tribe-tickets-commerce-gateway-mail-in {
+	margin: 30px 0 15px 0 !important; /* More space above */
+	border-radius: 4px;
+	border: 1px solid #ddd !important;
+	overflow: hidden;
+}
+
+/* Toggle Button Styling */
+.tribe-tickets-commerce-gateway-mail-in__toggle {
+	background: #f8f9fa;
+	border-bottom: 1px solid #dee2e6;
+}
+
+.tribe-tickets-commerce-gateway-mail-in__toggle-button {
+	width: 100%;
+	padding: 18px 20px; /* Slightly more padding for larger appearance */
+	background: none;
+	border: none;
+	text-align: center; /* Center the text */
+	cursor: pointer;
+	font-size: 18px; /* Larger font size */
+	font-weight: 500; /* Slightly bolder */
+	color: #0073aa;
+	display: flex;
+	align-items: center;
+	justify-content: center; /* Center the content */
+	gap: 12px; /* Slightly more gap */
+	transition: background-color 0.2s;
+}
+
+.tribe-tickets-commerce-gateway-mail-in__toggle-button:hover {
+	background: #e9ecef;
+}
+
+.tribe-tickets-commerce-gateway-mail-in__toggle-button:focus {
+	outline: 2px solid #0073aa;
+	outline-offset: -2px;
+}
+
+.toggle-icon {
+	font-size: 12px;
+	transition: transform 0.2s;
+	width: 12px;
+	display: inline-block;
+}
+
+/* Content Styling */
+.tribe-tickets-commerce-gateway-mail-in__content {
+	padding: 20px;
+	background: #fff;
+}
+
+.tribe-tickets-commerce-gateway-mail-in__header h4 {
+	margin: 0 0 10px 0;
+	color: #333;
+}
+
+.tribe-tickets-commerce-gateway-mail-in__description {
+	margin: 0 0 20px 0;
+	font-style: italic;
+	color: #666;
+}
+
+.tribe-tickets-commerce-gateway-mail-in__instructions {
+	background: #fff;
+	padding: 15px;
+	border-radius: 4px;
+	border: 1px solid #e5e5e5;
+}
+
+.tribe-tickets-commerce-gateway-mail-in__instructions strong {
+	color: #333;
+	font-size: 14px;
+}
+
+.tribe-tickets-commerce-gateway-mail-in__details {
+	margin: 15px 0;
+	display: grid;
+	grid-template-columns: 1fr 1fr;
+	gap: 20px;
+}
+
+@media (max-width: 768px) {
+	.tribe-tickets-commerce-gateway-mail-in__details {
+		grid-template-columns: 1fr;
+	}
+}
+
+.tribe-tickets-commerce-gateway-mail-in__payable-to-name {
+	font-size: 16px;
+	font-weight: bold;
+	margin: 5px 0;
+	color: #0073aa;
+}
+
+.tribe-tickets-commerce-gateway-mail-in__address-block {
+	background: #f5f5f5;
+	padding: 10px;
+	border-radius: 4px;
+	border-left: 3px solid #0073aa;
+	line-height: 1.6;
+	margin-top: 5px;
+}
+
+.tribe-tickets-commerce-gateway-mail-in__important-note {
+	background: #fff3cd;
+	border: 1px solid #ffeaa7;
+	padding: 15px;
+	border-radius: 4px;
+	margin-top: 15px;
+}
+
+.tribe-tickets-commerce-gateway-mail-in__important-note strong {
+	color: #856404;
+}
+
+.tribe-tickets-commerce-gateway-mail-in__important-note ul {
+	margin: 10px 0 0 0;
+	padding-left: 20px;
+}
+
+.tribe-tickets-commerce-gateway-mail-in__important-note li {
+	margin-bottom: 5px;
+	color: #856404;
+}
+
+/* Form styling */
+.tribe-tickets__commerce-checkout-purchaser-info {
+	background: #f8f9fa;
+	padding: 20px;
+	border-radius: 4px;
+	border: 1px solid #dee2e6;
+	margin: 20px 0;
+}
+
+.tribe-tickets__commerce-checkout-purchaser-info h4 {
+	margin: 0 0 15px 0;
+	color: #333;
+}
+
+.tribe-tickets__commerce-checkout-form-field {
+	margin-bottom: 15px;
+}
+
+.tribe-tickets__commerce-checkout-form-field label {
+	display: block;
+	margin-bottom: 5px;
+	font-weight: bold;
+	color: #333;
+}
+
+.tribe-tickets__commerce-checkout-form-field .required {
+	color: #dc3545;
+}
+
+.tribe-tickets__commerce-checkout-form-field input {
+	width: 100%;
+	padding: 8px 12px;
+	border: 1px solid #ced4da;
+	border-radius: 4px;
+	font-size: 14px;
+}
+
+.tribe-tickets__commerce-checkout-form-field input:focus {
+	outline: none;
+	border-color: #0073aa;
+	box-shadow: 0 0 0 2px rgba(0, 115, 170, 0.2);
+}
+
+.tribe-tickets__commerce-checkout-form-submit {
+	margin-top: 20px;
+}
+
+.tribe-tickets__commerce-checkout-form-submit-button {
+	background: #0073aa;
+	color: white;
+	border: none;
+	padding: 12px 24px;
+	border-radius: 4px;
+	font-size: 16px;
+	cursor: pointer;
+	transition: background-color 0.2s;
+}
+
+.tribe-tickets__commerce-checkout-form-submit-button:hover {
+	background: #005a87;
+}
\ No newline at end of file
diff --git a/assets/js/admin.js b/assets/js/admin.js
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--- /dev/null
+++ b/assets/js/admin.js
@@ -0,0 +1,63 @@
+/**
+ * Mail-In Payment Gateway Admin JavaScript
+ * @since 1.0.0
+ */
+
+(function($) {
+	'use strict';
+
+	$(document).ready(function() {
+		// Confirmation dialogs for admin actions
+		$('.et-mail-in-mark-received').on('click', function(e) {
+			const confirmMessage = etMailInAdmin.strings.confirm_received || 'Are you sure you want to mark this check as received?';
+			if (!confirm(confirmMessage)) {
+				e.preventDefault();
+				return false;
+			}
+		});
+
+		$('.et-mail-in-mark-bounced').on('click', function(e) {
+			const confirmMessage = etMailInAdmin.strings.confirm_bounced || 'Are you sure you want to mark this check as bounced?';
+			if (!confirm(confirmMessage)) {
+				e.preventDefault();
+				return false;
+			}
+		});
+
+		// Auto-hide admin notices after 5 seconds
+		setTimeout(function() {
+			$('.notice.is-dismissible').fadeOut();
+		}, 5000);
+
+		// Enhanced form validation
+		$('form[data-et-mail-in-form]').on('submit', function(e) {
+			const form = $(this);
+			const requiredFields = form.find('[required]');
+			let hasErrors = false;
+
+			requiredFields.each(function() {
+				const field = $(this);
+				const value = field.val().trim();
+				
+				if (!value) {
+					field.addClass('error');
+					hasErrors = true;
+				} else {
+					field.removeClass('error');
+				}
+			});
+
+			if (hasErrors) {
+				e.preventDefault();
+				alert('Please fill in all required fields.');
+				return false;
+			}
+		});
+
+		// Remove error styling on input
+		$('input, textarea, select').on('input change', function() {
+			$(this).removeClass('error');
+		});
+	});
+
+})(jQuery);
\ No newline at end of file
diff --git a/assets/js/checkout.js b/assets/js/checkout.js
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--- /dev/null
+++ b/assets/js/checkout.js
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+/**
+ * Mail-In Payment Gateway Checkout JavaScript
+ * @since 1.0.0
+ */
+
+document.addEventListener('DOMContentLoaded', function() {
+	const toggleButton = document.getElementById('mail-in-toggle-button');
+	const content = document.getElementById('mail-in-content');
+	const toggleIcon = toggleButton ? toggleButton.querySelector('.toggle-icon') : null;
+
+	// Only initialize if elements exist
+	if (!toggleButton || !content || !toggleIcon) {
+		return;
+	}
+
+	// Initialize accessibility attributes
+	toggleButton.setAttribute('aria-expanded', 'false');
+	toggleButton.setAttribute('aria-controls', 'mail-in-content');
+	content.setAttribute('aria-hidden', 'true');
+
+	toggleButton.addEventListener('click', function() {
+		const isExpanded = content.style.display !== 'none';
+		
+		if (isExpanded) {
+			// Hide content
+			content.style.display = 'none';
+			toggleIcon.textContent = '▶';
+			toggleButton.setAttribute('aria-expanded', 'false');
+			content.setAttribute('aria-hidden', 'true');
+		} else {
+			// Show content
+			content.style.display = 'block';
+			toggleIcon.textContent = '▼';
+			toggleButton.setAttribute('aria-expanded', 'true');
+			content.setAttribute('aria-hidden', 'false');
+		}
+	});
+
+	// Handle keyboard navigation
+	toggleButton.addEventListener('keydown', function(e) {
+		if (e.key === 'Enter' || e.key === ' ') {
+			e.preventDefault();
+			toggleButton.click();
+		}
+	});
+});
\ No newline at end of file
diff --git a/event-tickets-mail-in-payment.php b/event-tickets-mail-in-payment.php
new file mode 100644
index 0000000..27500bd
--- /dev/null
+++ b/event-tickets-mail-in-payment.php
@@ -0,0 +1,185 @@
+<?php
+/**
+ * Plugin Name: Event Tickets - Mail-In Payment Gateway
+ * Plugin URI: https://github.com/yourusername/event-tickets-mail-in-payment
+ * Description: Adds a mail-in payment gateway for Event Tickets Commerce to accept check payments.
+ * Version: 1.0.0
+ * Requires at least: 6.6
+ * Requires PHP: 7.4
+ * Author: Your Name
+ * License: GPLv2 or later
+ * License URI: https://www.gnu.org/licenses/gpl-2.0.html
+ * Text Domain: event-tickets-mail-in
+ * Domain Path: /languages/
+ */
+
+// Prevent direct access
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+// Define plugin constants
+define( 'ET_MAIL_IN_VERSION', '1.0.0' );
+define( 'ET_MAIL_IN_FILE', __FILE__ );
+define( 'ET_MAIL_IN_PATH', plugin_dir_path( __FILE__ ) );
+define( 'ET_MAIL_IN_URL', plugin_dir_url( __FILE__ ) );
+
+/**
+ * Main plugin class
+ */
+class ET_Mail_In_Payment {
+
+	/**
+	 * Single instance of the class
+	 *
+	 * @var ET_Mail_In_Payment
+	 */
+	private static $instance;
+
+	/**
+	 * Get single instance
+	 *
+	 * @return ET_Mail_In_Payment
+	 */
+	public static function instance() {
+		if ( ! isset( self::$instance ) ) {
+			self::$instance = new self();
+		}
+		return self::$instance;
+	}
+
+	/**
+	 * Constructor
+	 */
+	private function __construct() {
+		add_action( 'plugins_loaded', [ $this, 'init' ] );
+		register_activation_hook( __FILE__, [ $this, 'activate' ] );
+		register_deactivation_hook( __FILE__, [ $this, 'deactivate' ] );
+	}
+
+	/**
+	 * Initialize the plugin
+	 */
+	public function init() {
+		// Check if Event Tickets is active
+		if ( ! $this->is_event_tickets_active() ) {
+			add_action( 'admin_notices', [ $this, 'event_tickets_missing_notice' ] );
+			return;
+		}
+
+		// Load text domain
+		load_plugin_textdomain( 'event-tickets-mail-in', false, dirname( plugin_basename( __FILE__ ) ) . '/languages/' );
+
+		// Include required files
+		$this->includes();
+
+		// Initialize components
+		$this->init_components();
+	}
+
+	/**
+	 * Check if Event Tickets is active
+	 *
+	 * @return bool
+	 */
+	private function is_event_tickets_active() {
+		return class_exists( 'Tribe__Tickets__Main' ) && 
+			   class_exists( 'TEC\Tickets\Commerce\Module' );
+	}
+
+	/**
+	 * Include required files
+	 */
+	private function includes() {
+		require_once ET_MAIL_IN_PATH . 'src/Gateway.php';
+		require_once ET_MAIL_IN_PATH . 'src/Order.php';
+		require_once ET_MAIL_IN_PATH . 'src/Settings.php';
+		require_once ET_MAIL_IN_PATH . 'src/Provider.php';
+		require_once ET_MAIL_IN_PATH . 'src/Hooks.php';
+	}
+
+	/**
+	 * Initialize components
+	 */
+	private function init_components() {
+		// Register our provider with dependency injection container
+		tribe_register_provider( ET_Mail_In_Payment\Provider::class );
+	}
+
+	/**
+	 * Plugin activation
+	 */
+	public function activate() {
+		// Check dependencies
+		if ( ! $this->is_event_tickets_active() ) {
+			deactivate_plugins( plugin_basename( __FILE__ ) );
+			wp_die( 
+				__( 'Event Tickets - Mail-In Payment Gateway requires Event Tickets to be installed and activated.', 'event-tickets-mail-in' ),
+				__( 'Plugin Activation Error', 'event-tickets-mail-in' ),
+				[ 'back_link' => true ]
+			);
+		}
+
+		// Set default options if they don't exist
+		$this->set_default_options();
+	}
+
+	/**
+	 * Plugin deactivation
+	 */
+	public function deactivate() {
+		// Clean up if needed
+	}
+
+	/**
+	 * Get default payment instructions
+	 *
+	 * @return string
+	 */
+	private function get_default_instructions() {
+		return __( 'Please mail your check to the address provided below. Your tickets will be reserved for 7 days while we wait for your payment to arrive. Include your order number on the check memo line.', 'event-tickets-mail-in' );
+	}
+
+	/**
+	 * Set default options on activation
+	 */
+	private function set_default_options() {
+		// Set default options if they don't exist
+		if ( false === tribe_get_option( 'tickets-commerce-mail-in-enabled' ) ) {
+			tribe_update_option( 'tickets-commerce-mail-in-enabled', true );
+		}
+		
+		if ( empty( tribe_get_option( 'tickets-commerce-mail-in-title' ) ) ) {
+			tribe_update_option( 'tickets-commerce-mail-in-title', __( 'Mail-In Payment (Check)', 'event-tickets-mail-in' ) );
+		}
+		
+		if ( empty( tribe_get_option( 'tickets-commerce-mail-in-description' ) ) ) {
+			tribe_update_option( 'tickets-commerce-mail-in-description', __( 'Pay by mailing a check to our address.', 'event-tickets-mail-in' ) );
+		}
+		
+		if ( empty( tribe_get_option( 'tickets-commerce-mail-in-instructions' ) ) ) {
+			tribe_update_option( 'tickets-commerce-mail-in-instructions', $this->get_default_instructions() );
+		}
+		
+		// For testing purposes, set some default values
+		if ( empty( tribe_get_option( 'tickets-commerce-mail-in-address' ) ) ) {
+			tribe_update_option( 'tickets-commerce-mail-in-address', "123 Main Street\nAnytown, ST 12345\nUSA" );
+		}
+		
+		if ( empty( tribe_get_option( 'tickets-commerce-mail-in-payable-to' ) ) ) {
+			tribe_update_option( 'tickets-commerce-mail-in-payable-to', "Your Organization Name" );
+		}
+	}
+
+	/**
+	 * Display admin notice when Event Tickets is missing
+	 */
+	public function event_tickets_missing_notice() {
+		echo '<div class="notice notice-error"><p>';
+		echo esc_html__( 'Event Tickets - Mail-In Payment Gateway requires Event Tickets to be installed and activated.', 'event-tickets-mail-in' );
+		echo '</p></div>';
+	}
+}
+
+// Initialize the plugin
+ET_Mail_In_Payment::instance();
\ No newline at end of file
diff --git a/src/Gateway.php b/src/Gateway.php
new file mode 100644
index 0000000..63544ea
--- /dev/null
+++ b/src/Gateway.php
@@ -0,0 +1,546 @@
+<?php
+
+namespace ET_Mail_In_Payment;
+
+use TEC\Tickets\Commerce\Gateways\Contracts\Abstract_Gateway;
+use TEC\Tickets\Commerce\Status;
+use TEC\Tickets\Commerce\Utils\Value;
+
+/**
+ * Mail-In Payment Gateway class
+ *
+ * @since 1.0.0
+ */
+class Gateway extends Abstract_Gateway {
+
+	/**
+	 * Gateway key identifier
+	 *
+	 * @since 1.0.0
+	 * @var string
+	 */
+	protected static string $key = 'mail-in';
+
+	/**
+	 * Gateway settings class
+	 *
+	 * @since 1.0.0
+	 * @var string
+	 */
+	protected static string $settings = Settings::class;
+
+	/**
+	 * No merchant class needed for mail-in payments
+	 *
+	 * @since 1.0.0
+	 * @var string
+	 */
+	protected static string $merchant = '';
+
+	/**
+	 * Supported currencies (all currencies since it's manual)
+	 *
+	 * @since 1.0.0
+	 * @var array
+	 */
+	protected static array $supported_currencies = [
+		'USD', 'EUR', 'GBP', 'CAD', 'AUD', 'JPY', 'CHF', 'CNY', 'SEK', 'NZD',
+		'MXN', 'SGD', 'HKD', 'NOK', 'PHP', 'DKK', 'PLN', 'CZK', 'HUF', 'ILS',
+		'CLP', 'TRY', 'RON', 'HRK', 'BGN', 'BRL', 'ARS', 'INR', 'KRW', 'THB',
+		'MYR', 'ZAR', 'RUB', 'UAH', 'EGP', 'MAD', 'TND', 'DZD', 'NGN', 'KES'
+	];
+
+	/**
+	 * Get the gateway key
+	 *
+	 * @since 1.0.0
+	 * @return string
+	 */
+	public static function get_key(): string {
+		return static::$key;
+	}
+
+	/**
+	 * Get the gateway label
+	 *
+	 * @since 1.0.0
+	 * @return string
+	 */
+	public static function get_label() {
+		return tribe_get_option( 'tickets-commerce-mail-in-title', __( 'Mail-In Payment (Check)', 'event-tickets-mail-in' ) );
+	}
+
+	/**
+	 * Check if the gateway is connected/configured
+	 * Override Abstract_Gateway's merchant-dependent implementation
+	 *
+	 * @since 1.0.0
+	 * @return bool
+	 */
+	public static function is_connected(): bool {
+		if ( ! static::should_show() ) {
+			return false;
+		}
+		
+		// Gateway is connected if mailing address is configured
+		$address = tribe_get_option( 'tickets-commerce-mail-in-address', '' );
+		$payable_to = tribe_get_option( 'tickets-commerce-mail-in-payable-to', '' );
+		
+		return ! empty( $address ) && ! empty( $payable_to );
+	}
+
+	/**
+	 * Check if the gateway is active
+	 * Override Abstract_Gateway's merchant-dependent implementation
+	 *
+	 * @since 1.0.0
+	 * @return bool
+	 */
+	public static function is_active(): bool {
+		if ( ! static::should_show() ) {
+			return false;
+		}
+		
+		return static::is_enabled() && static::is_connected();
+	}
+
+	/**
+	 * Check if the gateway should be shown
+	 *
+	 * @since 1.0.0
+	 * @return bool
+	 */
+	public static function should_show() {
+		return true;
+	}
+
+	/**
+	 * Check if the gateway is enabled
+	 *
+	 * @since 1.0.0
+	 * @return bool
+	 */
+	public static function is_enabled(): bool {
+		$should_show = static::should_show();
+		$enabled_option = tribe_get_option( 'tickets-commerce-mail-in-enabled', false );
+		if ( ! $should_show ) {
+			return false;
+		}
+
+		return tribe_is_truthy( $enabled_option );
+	}
+
+	/**
+	 * Check if this gateway renders solo (prevents other gateways from showing)
+	 * Mail-in payments should coexist with other gateways
+	 * Override Abstract_Gateway's default true
+	 *
+	 * @since 1.0.0
+	 * @return bool
+	 */
+	public function renders_solo(): bool {
+		return false;
+	}
+
+	/**
+	 * Get gateway description
+	 *
+	 * @since 1.0.0
+	 * @return string
+	 */
+	public static function get_description() {
+		return tribe_get_option( 
+			'tickets-commerce-mail-in-description', 
+			__( 'Pay by mailing a check to our address.', 'event-tickets-mail-in' ) 
+		);
+	}
+
+	/**
+	 * Render the checkout form
+	 *
+	 * @since 1.0.0
+	 * @param array $args Template arguments
+	 * @return void
+	 */
+	public function checkout_form( $args = [] ) {
+		error_log( 'Mail-In Gateway: checkout_form called' );
+		
+		$instructions = tribe_get_option( 'tickets-commerce-mail-in-instructions', '' );
+		$mailing_address = tribe_get_option( 'tickets-commerce-mail-in-address', '' );
+		$payable_to = tribe_get_option( 'tickets-commerce-mail-in-payable-to', '' );
+
+		// Direct output for debugging
+		echo '<div style="background: blue; border: 5px solid orange; padding: 20px; margin: 20px; color: white; font-size: 16px;">';
+		echo '<h3>🔵 MAIL-IN CHECKOUT FORM 🔵</h3>';
+		echo '<p><strong>Label:</strong> ' . esc_html( static::get_label() ) . '</p>';
+		echo '<p><strong>Description:</strong> ' . esc_html( static::get_description() ) . '</p>';
+		echo '<p><strong>Payable To:</strong> ' . esc_html( $payable_to ) . '</p>';
+		echo '<p><strong>Address:</strong> ' . esc_html( $mailing_address ) . '</p>';
+		echo '</div>';
+	}
+
+	/**
+	 * Process the payment
+	 *
+	 * @since 1.0.0
+	 * @param array $order_data Order data
+	 * @return array Processing result
+	 */
+	public function process_payment( $order_data ) {
+		// For mail-in payments, we create the order in "pending" status
+		// and provide payment instructions
+		try {
+			// Get cart instance
+			$cart = tribe( \TEC\Tickets\Commerce\Cart::class );
+			
+			if ( ! $cart->has_items() ) {
+				return [
+					'success' => false,
+					'message' => __( 'Your cart is empty.', 'event-tickets-mail-in' ),
+				];
+			}
+			
+			// Extract purchaser data from order_data
+			$purchaser = null;
+			if ( isset( $order_data['purchaser_name'] ) || isset( $order_data['purchaser_email'] ) ) {
+				$purchaser = [
+					'purchaser_full_name' => $order_data['purchaser_name'] ?? '',
+					'purchaser_first_name' => $order_data['purchaser_first_name'] ?? '',
+					'purchaser_last_name' => $order_data['purchaser_last_name'] ?? '',
+					'purchaser_email' => $order_data['purchaser_email'] ?? '',
+					'purchaser_user_id' => $order_data['purchaser_user_id'] ?? null,
+				];
+			}
+			
+			// Create order from current cart using the main Order class (like other gateways)
+			$order = tribe( \TEC\Tickets\Commerce\Order::class )->create_from_cart( $this, $purchaser );
+			
+			if ( ! $order ) {
+				return [
+					'success' => false,
+					'message' => __( 'Failed to create order. Please try again.', 'event-tickets-mail-in' ),
+				];
+			}
+
+			// Set gateway order ID so success page can find the order
+			update_post_meta( $order->ID, '_tec_tc_order_gateway_order_id', $order->ID );
+			
+			// Add mail-in specific metadata
+			$this->add_mail_in_meta( $order );
+
+			// Set order to pending status (waiting for check to arrive)
+			tribe( \TEC\Tickets\Commerce\Order::class )->modify_status( $order->ID, Status\Pending::SLUG );
+			
+			// Clear the cart
+			$cart->clear_cart();
+
+			return [
+				'success' => true,
+				'order_id' => $order->ID,
+				'redirect_url' => $this->get_success_url( $order ),
+				'message' => __( 'Order created successfully. Please mail your check as instructed.', 'event-tickets-mail-in' ),
+			];
+
+		} catch ( \Exception $e ) {
+			return [
+				'success' => false,
+				'message' => sprintf(
+					__( 'Payment processing failed: %s', 'event-tickets-mail-in' ),
+					$e->getMessage()
+				),
+			];
+		}
+	}
+
+	/**
+	 * Create order for mail-in payment
+	 *
+	 * @since 1.0.0
+	 * @param array $order_data Order data (contains purchaser info)
+	 * @return \WP_Post|false
+	 */
+	protected function create_order( $order_data ) {
+		// Extract purchaser data from order_data
+		$purchaser = null;
+		if ( isset( $order_data['purchaser_name'] ) || isset( $order_data['purchaser_email'] ) ) {
+			$purchaser = [
+				'purchaser_full_name' => $order_data['purchaser_name'] ?? '',
+				'purchaser_first_name' => $order_data['purchaser_first_name'] ?? '',
+				'purchaser_last_name' => $order_data['purchaser_last_name'] ?? '',
+				'purchaser_email' => $order_data['purchaser_email'] ?? '',
+				'purchaser_user_id' => $order_data['purchaser_user_id'] ?? null,
+			];
+		}
+
+		// Use the main Order class like other gateways
+		$order = tribe( \TEC\Tickets\Commerce\Order::class )->create_from_cart( $this, $purchaser );
+		
+		if ( $order ) {
+			$this->add_mail_in_meta( $order );
+		}
+		
+		return $order;
+	}
+
+	/**
+	 * Add mail-in payment specific metadata
+	 *
+	 * @since 1.0.0
+	 * @param \WP_Post $order
+	 * @return void
+	 */
+	protected function add_mail_in_meta( $order ) {
+		$order_id = $order->ID;
+		
+		// Store gateway identifier 
+		update_post_meta( $order_id, '_tec_tc_gateway', 'mail-in' );
+		
+		// Store payment method
+		update_post_meta( $order_id, '_tec_tc_payment_method', 'mail-in-check' );
+		
+		// Store mailing instructions
+		$instructions = tribe_get_option( 'tickets-commerce-mail-in-instructions', '' );
+		if ( $instructions ) {
+			update_post_meta( $order_id, '_mail_in_instructions', $instructions );
+		}
+		
+		// Store mailing address
+		$address = tribe_get_option( 'tickets-commerce-mail-in-address', '' );
+		if ( $address ) {
+			update_post_meta( $order_id, '_mail_in_mailing_address', $address );
+		}
+		
+		// Store payable to
+		$payable_to = tribe_get_option( 'tickets-commerce-mail-in-payable-to', '' );
+		if ( $payable_to ) {
+			update_post_meta( $order_id, '_mail_in_payable_to', $payable_to );
+		}
+		
+		// Set check received flag to false initially
+		update_post_meta( $order_id, '_mail_in_check_received', false );
+		
+		// Store creation date for tracking purposes
+		update_post_meta( $order_id, '_mail_in_created_date', current_time( 'mysql' ) );
+		
+		// Add order note with payment instructions
+		$mailing_address = tribe_get_option( 'tickets-commerce-mail-in-address', '' );
+		$payable_to_name = tribe_get_option( 'tickets-commerce-mail-in-payable-to', '' );
+		
+		$note = __( 'Order created for mail-in payment. Customer should mail check to:', 'event-tickets-mail-in' ) . "\n";
+		$note .= $mailing_address . "\n";
+		$note .= __( 'Make payable to:', 'event-tickets-mail-in' ) . ' ' . $payable_to_name;
+		
+		$this->add_order_note( $order_id, $note );
+	}
+
+	/**
+	 * Add order note
+	 *
+	 * @since 1.0.0
+	 * @param int $order_id Order ID
+	 * @param string $note Note content
+	 * @return void
+	 */
+	protected function add_order_note( $order_id, $note ) {
+		$existing_notes = get_post_meta( $order_id, '_tec_tc_order_notes', true );
+		if ( ! is_array( $existing_notes ) ) {
+			$existing_notes = [];
+		}
+
+		$existing_notes[] = [
+			'date' => current_time( 'mysql' ),
+			'note' => $note,
+			'type' => 'system',
+		];
+
+		update_post_meta( $order_id, '_tec_tc_order_notes', $existing_notes );
+	}
+
+	/**
+	 * Generate unique order ID for mail-in payments
+	 *
+	 * @since 1.0.0
+	 * @return string
+	 */
+	protected function generate_order_id() {
+		return 'mail-in-' . uniqid() . '-' . time();
+	}
+
+	/**
+	 * Get success page URL
+	 *
+	 * @since 1.0.0
+	 * @param \WP_Post $order
+	 * @return string
+	 */
+	protected function get_success_url( $order ) {
+		return add_query_arg( [ 'tc-order-id' => $order->ID ], tribe( \TEC\Tickets\Commerce\Success::class )->get_url() );
+	}
+
+	/**
+	 * Handle refunds (not applicable for mail-in payments)
+	 *
+	 * @since 1.0.0
+	 * @param \TEC\Tickets\Commerce\Order $order
+	 * @param Value $amount
+	 * @return array
+	 */
+	public function process_refund( $order, Value $amount ) {
+		return [
+			'success' => false,
+			'message' => __( 'Refunds for mail-in payments must be processed manually.', 'event-tickets-mail-in' ),
+		];
+	}
+
+	/**
+	 * Get checkout template object
+	 *
+	 * @since 1.0.0
+	 * @return \Tribe__Template
+	 */
+	protected function get_template() {
+		return new \Tribe__Template();
+	}
+
+	/**
+	 * Validate checkout data
+	 *
+	 * @since 1.0.0
+	 * @param array $data Checkout data
+	 * @return bool|\WP_Error
+	 */
+	public function validate_checkout_data( $data ) {
+		// Basic validation - ensure required fields are present
+		if ( empty( $data['purchaser_email'] ) ) {
+			return new \WP_Error( 'missing_email', __( 'Email address is required.', 'event-tickets-mail-in' ) );
+		}
+
+		if ( empty( $data['purchaser_name'] ) ) {
+			return new \WP_Error( 'missing_name', __( 'Name is required.', 'event-tickets-mail-in' ) );
+		}
+
+		return true;
+	}
+
+	/**
+	 * Get gateway-specific order notes
+	 *
+	 * @since 1.0.0
+	 * @param \TEC\Tickets\Commerce\Order $order
+	 * @return array
+	 */
+	public function get_order_notes( $order ) {
+		$notes = [];
+		
+		$notes[] = sprintf(
+			__( 'Mail-in payment order created. Order ID: %s', 'event-tickets-mail-in' ),
+			$order->get_gateway_order_id()
+		);
+
+		$mailing_address = get_option( 'et_mail_in_mailing_address', '' );
+		$payable_to = get_option( 'et_mail_in_check_payable_to', '' );
+
+		if ( $mailing_address ) {
+			$notes[] = sprintf(
+				__( 'Check should be mailed to: %s', 'event-tickets-mail-in' ),
+				$mailing_address
+			);
+		}
+
+		if ( $payable_to ) {
+			$notes[] = sprintf(
+				__( 'Check should be made payable to: %s', 'event-tickets-mail-in' ),
+				$payable_to
+			);
+		}
+
+		return $notes;
+	}
+
+	/**
+	 * Get admin notices for the gateway
+	 *
+	 * @since 1.0.0
+	 * @return array
+	 */
+	public function get_admin_notices() {
+		$notices = [];
+
+		// Check if gateway is properly configured
+		if ( ! self::is_connected() ) {
+			$notices[] = [
+				'type' => 'warning',
+				'message' => sprintf(
+					__( 'Mail-In Payment gateway is not properly configured. Please <a href="%s">configure the required settings</a>.', 'event-tickets-mail-in' ),
+					self::get_settings_url()
+				),
+			];
+		}
+
+		return $notices;
+	}
+
+	/**
+	 * Get order details link by order
+	 *
+	 * @since 1.0.0
+	 * @param \WP_Post $order Order post object
+	 * @return string
+	 */
+	public function get_order_details_link_by_order( $order ): string {
+		// For mail-in payments, return the order ID as a simple string
+		return (string) $order->ID;
+	}
+
+	/**
+	 * Render checkout template
+	 *
+	 * @since 1.0.0
+	 * @param \Tribe__Template $template Template instance
+	 * @return string
+	 */
+	public function render_checkout_template( \Tribe__Template $template ): string {
+		$instructions = tribe_get_option( 'tickets-commerce-mail-in-instructions', '' );
+		$mailing_address = tribe_get_option( 'tickets-commerce-mail-in-address', '' );
+		$payable_to = tribe_get_option( 'tickets-commerce-mail-in-payable-to', '' );
+
+		$context = [
+			'gateway' => $this,
+			'instructions' => $instructions,
+			'mailing_address' => $mailing_address,
+			'payable_to' => $payable_to,
+		];
+
+		// Use our template file
+		ob_start();
+		$template_file = ET_MAIL_IN_PATH . 'templates/v2/commerce/gateway/mail-in/container.php';
+		
+		if ( file_exists( $template_file ) ) {
+			// Extract context variables for the template
+			extract( $context );
+			include $template_file;
+		} else {
+			// Fallback display if template file is missing
+			echo '<div class="tribe-tickets-commerce-gateway-mail-in">';
+			echo '<h4>' . esc_html( static::get_label() ) . '</h4>';
+			echo '<p>' . esc_html( static::get_description() ) . '</p>';
+			if ( $mailing_address ) {
+				echo '<p><strong>' . esc_html__( 'Mail your check to:', 'event-tickets-mail-in' ) . '</strong><br>';
+				echo esc_html( $mailing_address ) . '</p>';
+			}
+			if ( $payable_to ) {
+				echo '<p><strong>' . esc_html__( 'Make check payable to:', 'event-tickets-mail-in' ) . '</strong><br>';
+				echo esc_html( $payable_to ) . '</p>';
+			}
+			echo '</div>';
+		}
+		
+		$output = ob_get_clean();
+		
+		// Output directly to handle any buffering issues with the shortcode
+		echo $output;
+		
+		return $output;
+	}
+
+}
\ No newline at end of file
diff --git a/src/Hooks.php b/src/Hooks.php
new file mode 100644
index 0000000..87730b7
--- /dev/null
+++ b/src/Hooks.php
@@ -0,0 +1,405 @@
+<?php
+
+namespace ET_Mail_In_Payment;
+
+/**
+ * Mail-In Payment Hooks class
+ *
+ * @since 1.0.0
+ */
+class Hooks {
+
+	/**
+	 * Register hooks
+	 *
+	 * @since 1.0.0
+	 * @return void
+	 */
+	public function register() {
+		// Template hooks
+		add_filter( 'tec_tickets_commerce_checkout_template_paths', [ $this, 'add_template_paths' ] );
+		
+		// Email hooks
+		add_action( 'tec_tickets_commerce_order_created', [ $this, 'send_payment_instructions' ], 10, 2 );
+		
+		// Order status hooks
+		add_action( 'tec_tickets_commerce_order_status_changed', [ $this, 'handle_status_change' ], 10, 3 );
+		
+		// Cleanup hooks for expired orders
+		add_action( 'init', [ $this, 'schedule_cleanup' ] );
+		add_action( 'et_mail_in_cleanup_expired_orders', [ $this, 'cleanup_expired_orders' ] );
+		
+		// Admin hooks
+		add_filter( 'tec_tickets_commerce_order_actions', [ $this, 'add_order_actions' ], 10, 2 );
+		
+		// Gateway display hooks
+		add_filter( 'tec_tickets_commerce_gateway_checkout_template', [ $this, 'get_checkout_template' ], 10, 2 );
+	}
+
+	/**
+	 * Add template paths for mail-in payment templates
+	 *
+	 * @since 1.0.0
+	 * @param array $paths Template paths
+	 * @return array
+	 */
+	public function add_template_paths( $paths ) {
+		$paths[] = ET_MAIL_IN_PATH . 'templates/';
+		return $paths;
+	}
+
+	/**
+	 * Send payment instructions email when order is created
+	 *
+	 * @since 1.0.0
+	 * @param \TEC\Tickets\Commerce\Order $order Order object
+	 * @param array $cart_data Cart data
+	 * @return void
+	 */
+	public function send_payment_instructions( $order, $cart_data ) {
+		// Only for mail-in payment orders
+		if ( $order->get_gateway() !== 'mail-in' ) {
+			return;
+		}
+
+		$this->send_instructions_email( $order );
+	}
+
+	/**
+	 * Handle order status changes
+	 *
+	 * @since 1.0.0
+	 * @param \TEC\Tickets\Commerce\Order $order Order object
+	 * @param string $old_status Previous status
+	 * @param string $new_status New status
+	 * @return void
+	 */
+	public function handle_status_change( $order, $old_status, $new_status ) {
+		// Only for mail-in payment orders
+		if ( $order->get_gateway() !== 'mail-in' ) {
+			return;
+		}
+
+		// Send confirmation email when payment is completed
+		if ( $new_status === 'completed' ) {
+			$this->send_confirmation_email( $order );
+		}
+
+		// Send cancellation email if order is cancelled
+		if ( in_array( $new_status, [ 'denied', 'cancelled', 'refunded' ] ) ) {
+			$this->send_cancellation_email( $order );
+		}
+	}
+
+	/**
+	 * Schedule cleanup of expired orders
+	 *
+	 * @since 1.0.0
+	 * @return void
+	 */
+	public function schedule_cleanup() {
+		if ( ! wp_next_scheduled( 'et_mail_in_cleanup_expired_orders' ) ) {
+			wp_schedule_event( time(), 'daily', 'et_mail_in_cleanup_expired_orders' );
+		}
+	}
+
+	/**
+	 * Cleanup expired mail-in orders
+	 *
+	 * @since 1.0.0
+	 * @return void
+	 */
+	public function cleanup_expired_orders() {
+		// Only run if auto-cancel is enabled
+		if ( ! tribe_get_option( 'tickets-commerce-mail-in-auto-cancel', false ) ) {
+			return;
+		}
+
+		$reservation_days = absint( tribe_get_option( 'tickets-commerce-mail-in-reservation-days', 7 ) );
+		$cutoff_date = date( 'Y-m-d H:i:s', strtotime( "-{$reservation_days} days" ) );
+
+		$args = [
+			'post_type' => 'tec_tc_order',
+			'meta_query' => [
+				[
+					'key' => '_tec_tc_gateway',
+					'value' => 'mail-in',
+					'compare' => '='
+				],
+				[
+					'key' => '_mail_in_check_received',
+					'value' => false,
+					'compare' => '='
+				],
+				[
+					'key' => '_mail_in_created_date',
+					'value' => $cutoff_date,
+					'compare' => '<',
+					'type' => 'DATETIME'
+				]
+			],
+			'post_status' => [ 'tec-tc-pending', 'tec-tc-approved' ],
+			'posts_per_page' => 50, // Process in batches
+		];
+
+		$expired_orders = new \WP_Query( $args );
+		$order_controller = new Order();
+
+		foreach ( $expired_orders->posts as $order_post ) {
+			$order = tribe( 'tickets.commerce.order' )->get_by_id( $order_post->ID );
+			
+			if ( $order ) {
+				// Cancel the order
+				$order->update_status( 'denied' );
+				
+				// Add order note
+				$order_controller->add_order_note( 
+					$order_post->ID, 
+					__( 'Order automatically cancelled due to expired payment deadline.', 'event-tickets-mail-in' )
+				);
+			}
+		}
+	}
+
+	/**
+	 * Add custom actions to order admin page
+	 *
+	 * @since 1.0.0
+	 * @param array $actions Existing actions
+	 * @param \TEC\Tickets\Commerce\Order $order Order object
+	 * @return array
+	 */
+	public function add_order_actions( $actions, $order ) {
+		// Only for mail-in payment orders
+		if ( $order->get_gateway() !== 'mail-in' ) {
+			return $actions;
+		}
+
+		$order_controller = new Order();
+		$details = $order_controller->get_mail_in_details( $order->get_id() );
+
+		// Add "Mark Check Received" action if check hasn't been received
+		if ( ! $details['check_received'] && ! $details['check_bounced'] ) {
+			$actions['mark_check_received'] = [
+				'label' => __( 'Mark Check Received', 'event-tickets-mail-in' ),
+				'url' => wp_nonce_url( 
+					admin_url( 'admin-post.php?action=mark_check_received&order_id=' . $order->get_id() ),
+					'et_mail_in_admin'
+				),
+				'class' => 'button-secondary',
+			];
+
+			$actions['mark_check_bounced'] = [
+				'label' => __( 'Mark Check Bounced', 'event-tickets-mail-in' ),
+				'url' => wp_nonce_url(
+					admin_url( 'admin-post.php?action=mark_check_bounced&order_id=' . $order->get_id() ),
+					'et_mail_in_admin'
+				),
+				'class' => 'button-secondary',
+			];
+		}
+
+		return $actions;
+	}
+
+	/**
+	 * Get checkout template for mail-in payment
+	 *
+	 * @since 1.0.0
+	 * @param string $template Template name
+	 * @param string $gateway Gateway key
+	 * @return string
+	 */
+	public function get_checkout_template( $template, $gateway ) {
+		if ( $gateway === 'mail-in' ) {
+			return 'checkout/mail-in-form';
+		}
+		return $template;
+	}
+
+	/**
+	 * Send payment instructions email
+	 *
+	 * @since 1.0.0
+	 * @param \TEC\Tickets\Commerce\Order $order Order object
+	 * @return void
+	 */
+	protected function send_instructions_email( $order ) {
+		$purchaser_email = $order->get_purchaser_email();
+		if ( ! $purchaser_email ) {
+			return;
+		}
+
+		$subject = sprintf(
+			__( 'Payment Instructions for Order #%s', 'event-tickets-mail-in' ),
+			$order->get_order_number()
+		);
+
+		$order_controller = new Order();
+		$details = $order_controller->get_mail_in_details( $order->get_id() );
+
+		$message = $this->get_email_template( 'payment-instructions', [
+			'order' => $order,
+			'details' => $details,
+		] );
+
+		wp_mail( $purchaser_email, $subject, $message, $this->get_email_headers() );
+	}
+
+	/**
+	 * Send payment confirmation email
+	 *
+	 * @since 1.0.0
+	 * @param \TEC\Tickets\Commerce\Order $order Order object
+	 * @return void
+	 */
+	protected function send_confirmation_email( $order ) {
+		$purchaser_email = $order->get_purchaser_email();
+		if ( ! $purchaser_email ) {
+			return;
+		}
+
+		$subject = sprintf(
+			__( 'Payment Confirmed for Order #%s', 'event-tickets-mail-in' ),
+			$order->get_order_number()
+		);
+
+		$message = $this->get_email_template( 'payment-confirmation', [
+			'order' => $order,
+		] );
+
+		wp_mail( $purchaser_email, $subject, $message, $this->get_email_headers() );
+	}
+
+	/**
+	 * Send order cancellation email
+	 *
+	 * @since 1.0.0
+	 * @param \TEC\Tickets\Commerce\Order $order Order object
+	 * @return void
+	 */
+	protected function send_cancellation_email( $order ) {
+		$purchaser_email = $order->get_purchaser_email();
+		if ( ! $purchaser_email ) {
+			return;
+		}
+
+		$subject = sprintf(
+			__( 'Order Cancelled: #%s', 'event-tickets-mail-in' ),
+			$order->get_order_number()
+		);
+
+		$message = $this->get_email_template( 'order-cancelled', [
+			'order' => $order,
+		] );
+
+		wp_mail( $purchaser_email, $subject, $message, $this->get_email_headers() );
+	}
+
+	/**
+	 * Get email template content
+	 *
+	 * @since 1.0.0
+	 * @param string $template Template name
+	 * @param array $args Template arguments
+	 * @return string
+	 */
+	protected function get_email_template( $template, $args = [] ) {
+		$template_file = ET_MAIL_IN_PATH . "templates/emails/{$template}.php";
+		
+		if ( ! file_exists( $template_file ) ) {
+			return $this->get_fallback_email_content( $template, $args );
+		}
+
+		ob_start();
+		extract( $args );
+		include $template_file;
+		return ob_get_clean();
+	}
+
+	/**
+	 * Get fallback email content
+	 *
+	 * @since 1.0.0
+	 * @param string $template Template name
+	 * @param array $args Template arguments
+	 * @return string
+	 */
+	protected function get_fallback_email_content( $template, $args ) {
+		switch ( $template ) {
+			case 'payment-instructions':
+				return $this->get_instructions_fallback( $args );
+			case 'payment-confirmation':
+				return $this->get_confirmation_fallback( $args );
+			case 'order-cancelled':
+				return $this->get_cancellation_fallback( $args );
+			default:
+				return '';
+		}
+	}
+
+	/**
+	 * Get payment instructions fallback content
+	 *
+	 * @since 1.0.0
+	 * @param array $args Template arguments
+	 * @return string
+	 */
+	protected function get_instructions_fallback( $args ) {
+		$order = $args['order'];
+		$details = $args['details'];
+
+		$content = sprintf( __( 'Thank you for your order #%s!', 'event-tickets-mail-in' ), $order->get_order_number() ) . "\n\n";
+		$content .= $details['instructions'] . "\n\n";
+		$content .= sprintf( __( 'Mailing Address:\n%s', 'event-tickets-mail-in' ), $details['mailing_address'] ) . "\n\n";
+		$content .= sprintf( __( 'Make Check Payable To: %s', 'event-tickets-mail-in' ), $details['payable_to'] ) . "\n\n";
+		$content .= sprintf( __( 'Order Total: %s', 'event-tickets-mail-in' ), $order->get_total_value()->get_formatted() ) . "\n";
+
+		return $content;
+	}
+
+	/**
+	 * Get confirmation fallback content
+	 *
+	 * @since 1.0.0
+	 * @param array $args Template arguments
+	 * @return string
+	 */
+	protected function get_confirmation_fallback( $args ) {
+		$order = $args['order'];
+
+		return sprintf(
+			__( 'Your payment for order #%s has been received and processed. Your tickets are now confirmed!', 'event-tickets-mail-in' ),
+			$order->get_order_number()
+		);
+	}
+
+	/**
+	 * Get cancellation fallback content
+	 *
+	 * @since 1.0.0
+	 * @param array $args Template arguments
+	 * @return string
+	 */
+	protected function get_cancellation_fallback( $args ) {
+		$order = $args['order'];
+
+		return sprintf(
+			__( 'Your order #%s has been cancelled. If you believe this is an error, please contact us.', 'event-tickets-mail-in' ),
+			$order->get_order_number()
+		);
+	}
+
+	/**
+	 * Get email headers
+	 *
+	 * @since 1.0.0
+	 * @return array
+	 */
+	protected function get_email_headers() {
+		return [
+			'Content-Type: text/html; charset=UTF-8',
+			'From: ' . get_option( 'blogname' ) . ' <' . get_option( 'admin_email' ) . '>',
+		];
+	}
+}
\ No newline at end of file
diff --git a/src/Order.php b/src/Order.php
new file mode 100644
index 0000000..91b7509
--- /dev/null
+++ b/src/Order.php
@@ -0,0 +1,251 @@
+<?php
+
+namespace ET_Mail_In_Payment;
+
+use TEC\Tickets\Commerce\Abstract_Order;
+use TEC\Tickets\Commerce\Order as Commerce_Order;
+use TEC\Tickets\Commerce\Status;
+
+/**
+ * Mail-In Payment Order class
+ *
+ * @since 1.0.0
+ */
+class Order extends Abstract_Order {
+
+	/**
+	 * Create order with mail-in payment gateway
+	 *
+	 * @since 1.0.0
+	 * @param \TEC\Tickets\Commerce\Gateways\Contracts\Gateway_Interface $gateway Gateway instance
+	 * @param array|null $purchaser Purchaser data
+	 * @return \TEC\Tickets\Commerce\Order|false
+	 */
+	public function create_from_gateway( \TEC\Tickets\Commerce\Gateways\Contracts\Gateway_Interface $gateway, $purchaser = null ) {
+		// Use the main Commerce Order class to create the order
+		$order = tribe( \TEC\Tickets\Commerce\Order::class )->create_from_cart( $gateway, $purchaser );
+		
+		if ( ! $order ) {
+			return false;
+		}
+
+		// Add mail-in specific meta data
+		$this->add_mail_in_meta( $order );
+
+		return $order;
+	}
+
+	/**
+	 * Add mail-in payment specific metadata
+	 *
+	 * @since 1.0.0
+	 * @param \TEC\Tickets\Commerce\Order $order
+	 * @return void
+	 */
+	protected function add_mail_in_meta( $order ) {
+		$order_id = $order->get_id();
+		
+		// Store payment method
+		update_post_meta( $order_id, '_tec_tc_payment_method', 'mail-in-check' );
+		
+		// Store mailing instructions
+		$instructions = get_option( 'et_mail_in_instructions', '' );
+		if ( $instructions ) {
+			update_post_meta( $order_id, '_mail_in_instructions', $instructions );
+		}
+		
+		// Store mailing address
+		$address = get_option( 'et_mail_in_mailing_address', '' );
+		if ( $address ) {
+			update_post_meta( $order_id, '_mail_in_mailing_address', $address );
+		}
+		
+		// Store payable to
+		$payable_to = get_option( 'et_mail_in_check_payable_to', '' );
+		if ( $payable_to ) {
+			update_post_meta( $order_id, '_mail_in_payable_to', $payable_to );
+		}
+		
+		// Set check received flag to false initially
+		update_post_meta( $order_id, '_mail_in_check_received', false );
+		
+		// Store creation date for tracking purposes
+		update_post_meta( $order_id, '_mail_in_created_date', current_time( 'mysql' ) );
+		
+		// Add order note
+		$this->add_order_note( 
+			$order_id, 
+			__( 'Mail-in payment order created. Awaiting check payment.', 'event-tickets-mail-in' )
+		);
+	}
+
+	/**
+	 * Mark check as received
+	 *
+	 * @since 1.0.0
+	 * @param int $order_id Order ID
+	 * @param string $notes Optional notes about the received check
+	 * @return bool
+	 */
+	public function mark_check_received( $order_id, $notes = '' ) {
+		$order = $this->get_order( $order_id );
+		
+		if ( ! $order ) {
+			return false;
+		}
+
+		// Update check received status
+		update_post_meta( $order_id, '_mail_in_check_received', true );
+		update_post_meta( $order_id, '_mail_in_check_received_date', current_time( 'mysql' ) );
+		
+		// Add notes if provided
+		if ( $notes ) {
+			update_post_meta( $order_id, '_mail_in_check_notes', $notes );
+		}
+
+		// Update order status to completed
+		tribe( \TEC\Tickets\Commerce\Order::class )->modify_status( $order_id, Status\Completed::SLUG );
+
+		// Add order note
+		$note = __( 'Check payment received and processed.', 'event-tickets-mail-in' );
+		if ( $notes ) {
+			$note .= ' ' . sprintf( __( 'Notes: %s', 'event-tickets-mail-in' ), $notes );
+		}
+		
+		$this->add_order_note( $order_id, $note );
+
+		return true;
+	}
+
+	/**
+	 * Mark check as bounced/failed
+	 *
+	 * @since 1.0.0
+	 * @param int $order_id Order ID
+	 * @param string $reason Reason for bounce/failure
+	 * @return bool
+	 */
+	public function mark_check_bounced( $order_id, $reason = '' ) {
+		$order = $this->get_order( $order_id );
+		
+		if ( ! $order ) {
+			return false;
+		}
+
+		// Update order status to denied
+		tribe( \TEC\Tickets\Commerce\Order::class )->modify_status( $order_id, Status\Denied::SLUG );
+
+		// Add bounce information
+		update_post_meta( $order_id, '_mail_in_check_bounced', true );
+		update_post_meta( $order_id, '_mail_in_check_bounce_date', current_time( 'mysql' ) );
+		
+		if ( $reason ) {
+			update_post_meta( $order_id, '_mail_in_bounce_reason', $reason );
+		}
+
+		// Add order note
+		$note = __( 'Check payment bounced/failed.', 'event-tickets-mail-in' );
+		if ( $reason ) {
+			$note .= ' ' . sprintf( __( 'Reason: %s', 'event-tickets-mail-in' ), $reason );
+		}
+		
+		$this->add_order_note( $order_id, $note );
+
+		return true;
+	}
+
+	/**
+	 * Get mail-in payment details for an order
+	 *
+	 * @since 1.0.0
+	 * @param int $order_id Order ID
+	 * @return array
+	 */
+	public function get_mail_in_details( $order_id ) {
+		return [
+			'instructions' => get_post_meta( $order_id, '_mail_in_instructions', true ),
+			'mailing_address' => get_post_meta( $order_id, '_mail_in_mailing_address', true ),
+			'payable_to' => get_post_meta( $order_id, '_mail_in_payable_to', true ),
+			'check_received' => get_post_meta( $order_id, '_mail_in_check_received', true ),
+			'check_received_date' => get_post_meta( $order_id, '_mail_in_check_received_date', true ),
+			'check_notes' => get_post_meta( $order_id, '_mail_in_check_notes', true ),
+			'check_bounced' => get_post_meta( $order_id, '_mail_in_check_bounced', true ),
+			'bounce_reason' => get_post_meta( $order_id, '_mail_in_bounce_reason', true ),
+			'bounce_date' => get_post_meta( $order_id, '_mail_in_check_bounce_date', true ),
+			'created_date' => get_post_meta( $order_id, '_mail_in_created_date', true ),
+		];
+	}
+
+	/**
+	 * Add order note
+	 *
+	 * @since 1.0.0
+	 * @param int $order_id Order ID
+	 * @param string $note Note content
+	 * @return void
+	 */
+	public function add_order_note( $order_id, $note ) {
+		$existing_notes = get_post_meta( $order_id, '_tec_tc_order_notes', true );
+		if ( ! is_array( $existing_notes ) ) {
+			$existing_notes = [];
+		}
+
+		$existing_notes[] = [
+			'date' => current_time( 'mysql' ),
+			'note' => $note,
+			'type' => 'system',
+		];
+
+		update_post_meta( $order_id, '_tec_tc_order_notes', $existing_notes );
+	}
+
+	/**
+	 * Get order by ID
+	 *
+	 * @since 1.0.0
+	 * @param int $order_id Order ID
+	 * @return \WP_Post|false
+	 */
+	protected function get_order( $order_id ) {
+		$order = get_post( $order_id );
+		
+		// Verify this is actually an order post
+		if ( ! $order || $order->post_type !== 'tec_tc_order' ) {
+			return false;
+		}
+		
+		return $order;
+	}
+
+	/**
+	 * Get pending mail-in orders (for admin management)
+	 *
+	 * @since 1.0.0
+	 * @param array $args Query arguments
+	 * @return \WP_Query
+	 */
+	public function get_pending_orders( $args = [] ) {
+		$default_args = [
+			'post_type' => 'tec_tc_order',
+			'meta_query' => [
+				[
+					'key' => '_tec_tc_gateway',
+					'value' => 'mail-in',
+					'compare' => '='
+				],
+				[
+					'key' => '_mail_in_check_received',
+					'value' => false,
+					'compare' => '='
+				]
+			],
+			'post_status' => [ 'tec-tc-pending', 'tec-tc-approved' ],
+			'orderby' => 'date',
+			'order' => 'DESC',
+		];
+
+		$args = wp_parse_args( $args, $default_args );
+		
+		return new \WP_Query( $args );
+	}
+}
\ No newline at end of file
diff --git a/src/Provider.php b/src/Provider.php
new file mode 100644
index 0000000..4059c5c
--- /dev/null
+++ b/src/Provider.php
@@ -0,0 +1,442 @@
+<?php
+
+namespace ET_Mail_In_Payment;
+
+use TEC\Common\Contracts\Service_Provider;
+
+/**
+ * Mail-In Payment Service Provider
+ *
+ * @since 1.0.0
+ */
+class Provider extends Service_Provider {
+
+	/**
+	 * Register services
+	 *
+	 * @since 1.0.0
+	 * @return void
+	 */
+	public function register() {
+		// Register gateway with Commerce module - match PayPal's implementation
+		add_filter( 'tec_tickets_commerce_gateways', [ $this, 'filter_add_gateway' ], 10, 2 );
+		
+		// Register hooks
+		$this->register_hooks();
+		
+		// Register admin features
+		$this->register_admin_features();
+		
+		// Register form processing
+		$this->register_form_processing();
+		
+		// Register frontend assets
+		$this->register_frontend_assets();
+	}
+
+	/**
+	 * Add this gateway to the list of available gateways
+	 *
+	 * @since 1.0.0
+	 * @param array $gateways Existing gateways
+	 * @return array
+	 */
+	public function filter_add_gateway( array $gateways = [] ) {
+		// Create our gateway instance and register it
+		return $this->container->make( Gateway::class )->register_gateway( $gateways );
+	}
+
+	/**
+	 * Register hooks and filters
+	 *
+	 * @since 1.0.0
+	 * @return void
+	 */
+	protected function register_hooks() {
+		$hooks = new Hooks();
+		$hooks->register();
+	}
+
+	/**
+	 * Register admin features
+	 *
+	 * @since 1.0.0
+	 * @return void
+	 */
+	protected function register_admin_features() {
+		if ( ! is_admin() ) {
+			return;
+		}
+
+		// Add admin menu for managing mail-in orders
+		add_action( 'admin_menu', [ $this, 'add_admin_menu' ] );
+		
+		// Add admin scripts and styles
+		add_action( 'admin_enqueue_scripts', [ $this, 'admin_scripts' ] );
+		
+		// Add order meta box for mail-in payments
+		add_action( 'add_meta_boxes', [ $this, 'add_order_meta_box' ] );
+		
+		// Handle admin actions
+		add_action( 'admin_post_mark_check_received', [ $this, 'handle_mark_check_received' ] );
+		add_action( 'admin_post_mark_check_bounced', [ $this, 'handle_mark_check_bounced' ] );
+	}
+
+	/**
+	 * Add admin menu for mail-in order management
+	 *
+	 * @since 1.0.0
+	 * @return void
+	 */
+	public function add_admin_menu() {
+		add_submenu_page(
+			'edit.php?post_type=tec_tc_order',
+			__( 'Mail-In Payments', 'event-tickets-mail-in' ),
+			__( 'Mail-In Payments', 'event-tickets-mail-in' ),
+			'manage_options',
+			'mail-in-payments',
+			[ $this, 'admin_page' ]
+		);
+	}
+
+	/**
+	 * Display admin page for managing mail-in payments
+	 *
+	 * @since 1.0.0
+	 * @return void
+	 */
+	public function admin_page() {
+		$order_controller = new Order();
+		$pending_orders = $order_controller->get_pending_orders();
+		
+		include ET_MAIL_IN_PATH . 'templates/admin/mail-in-orders.php';
+	}
+
+	/**
+	 * Enqueue admin scripts and styles
+	 *
+	 * @since 1.0.0
+	 * @param string $hook Current admin page hook
+	 * @return void
+	 */
+	public function admin_scripts( $hook ) {
+		// Only load on relevant admin pages
+		if ( ! in_array( $hook, [ 'edit.php', 'post.php', 'tickets_page_mail-in-payments' ] ) ) {
+			return;
+		}
+
+		wp_enqueue_style(
+			'et-mail-in-admin',
+			ET_MAIL_IN_URL . 'assets/css/admin.css',
+			[],
+			ET_MAIL_IN_VERSION
+		);
+
+		wp_enqueue_script(
+			'et-mail-in-admin',
+			ET_MAIL_IN_URL . 'assets/js/admin.js',
+			[ 'jquery' ],
+			ET_MAIL_IN_VERSION,
+			true
+		);
+
+		wp_localize_script( 'et-mail-in-admin', 'etMailInAdmin', [
+			'nonce' => wp_create_nonce( 'et_mail_in_admin' ),
+			'ajaxurl' => admin_url( 'admin-ajax.php' ),
+			'strings' => [
+				'confirm_received' => __( 'Are you sure you want to mark this check as received?', 'event-tickets-mail-in' ),
+				'confirm_bounced' => __( 'Are you sure you want to mark this check as bounced?', 'event-tickets-mail-in' ),
+			],
+		] );
+	}
+
+	/**
+	 * Add meta box to order edit screen
+	 *
+	 * @since 1.0.0
+	 * @return void
+	 */
+	public function add_order_meta_box() {
+		global $post;
+		
+		// Only add to mail-in orders
+		if ( get_post_meta( $post->ID, '_tec_tc_gateway', true ) !== 'mail-in' ) {
+			return;
+		}
+
+		add_meta_box(
+			'mail-in-payment-details',
+			__( 'Mail-In Payment Details', 'event-tickets-mail-in' ),
+			[ $this, 'order_meta_box_callback' ],
+			'tec_tc_order',
+			'normal',
+			'high'
+		);
+	}
+
+	/**
+	 * Render order meta box
+	 *
+	 * @since 1.0.0
+	 * @param \WP_Post $post Order post object
+	 * @return void
+	 */
+	public function order_meta_box_callback( $post ) {
+		$order_controller = new Order();
+		$details = $order_controller->get_mail_in_details( $post->ID );
+		
+		include ET_MAIL_IN_PATH . 'templates/admin/order-meta-box.php';
+	}
+
+	/**
+	 * Handle marking check as received
+	 *
+	 * @since 1.0.0
+	 * @return void
+	 */
+	public function handle_mark_check_received() {
+		// Verify nonce
+		if ( ! wp_verify_nonce( $_POST['nonce'] ?? '', 'et_mail_in_admin' ) ) {
+			wp_die( __( 'Security check failed.', 'event-tickets-mail-in' ) );
+		}
+
+		// Check permissions
+		if ( ! current_user_can( 'manage_options' ) ) {
+			wp_die( __( 'You do not have permission to perform this action.', 'event-tickets-mail-in' ) );
+		}
+
+		$order_id = absint( $_POST['order_id'] ?? 0 );
+		$notes = sanitize_textarea_field( $_POST['notes'] ?? '' );
+
+		if ( ! $order_id ) {
+			wp_die( __( 'Invalid order ID.', 'event-tickets-mail-in' ) );
+		}
+
+		$order_controller = new Order();
+		$result = $order_controller->mark_check_received( $order_id, $notes );
+
+		if ( $result ) {
+			add_action( 'admin_notices', function() {
+				echo '<div class="notice notice-success is-dismissible"><p>' . 
+					 esc_html__( 'Check marked as received successfully.', 'event-tickets-mail-in' ) . 
+					 '</p></div>';
+			} );
+		} else {
+			add_action( 'admin_notices', function() {
+				echo '<div class="notice notice-error is-dismissible"><p>' . 
+					 esc_html__( 'Failed to mark check as received.', 'event-tickets-mail-in' ) . 
+					 '</p></div>';
+			} );
+		}
+
+		// Redirect back
+		$redirect_url = $_POST['redirect_url'] ?? admin_url( 'edit.php?post_type=tec_tc_order&page=mail-in-payments' );
+		wp_redirect( $redirect_url );
+		exit;
+	}
+
+	/**
+	 * Handle marking check as bounced
+	 *
+	 * @since 1.0.0
+	 * @return void
+	 */
+	public function handle_mark_check_bounced() {
+		// Verify nonce
+		if ( ! wp_verify_nonce( $_POST['nonce'] ?? '', 'et_mail_in_admin' ) ) {
+			wp_die( __( 'Security check failed.', 'event-tickets-mail-in' ) );
+		}
+
+		// Check permissions
+		if ( ! current_user_can( 'manage_options' ) ) {
+			wp_die( __( 'You do not have permission to perform this action.', 'event-tickets-mail-in' ) );
+		}
+
+		$order_id = absint( $_POST['order_id'] ?? 0 );
+		$reason = sanitize_textarea_field( $_POST['reason'] ?? '' );
+
+		if ( ! $order_id ) {
+			wp_die( __( 'Invalid order ID.', 'event-tickets-mail-in' ) );
+		}
+
+		$order_controller = new Order();
+		$result = $order_controller->mark_check_bounced( $order_id, $reason );
+
+		if ( $result ) {
+			add_action( 'admin_notices', function() {
+				echo '<div class="notice notice-success is-dismissible"><p>' . 
+					 esc_html__( 'Check marked as bounced successfully.', 'event-tickets-mail-in' ) . 
+					 '</p></div>';
+			} );
+		} else {
+			add_action( 'admin_notices', function() {
+				echo '<div class="notice notice-error is-dismissible"><p>' . 
+					 esc_html__( 'Failed to mark check as bounced.', 'event-tickets-mail-in' ) . 
+					 '</p></div>';
+			} );
+		}
+
+		// Redirect back
+		$redirect_url = $_POST['redirect_url'] ?? admin_url( 'edit.php?post_type=tec_tc_order&page=mail-in-payments' );
+		wp_redirect( $redirect_url );
+		exit;
+	}
+
+	/**
+	 * Register form processing
+	 *
+	 * @since 1.0.0
+	 * @return void
+	 */
+	protected function register_form_processing() {
+		// Handle checkout form submission
+		add_action( 'template_redirect', [ $this, 'handle_checkout_form' ] );
+	}
+
+	/**
+	 * Handle checkout form submission
+	 *
+	 * @since 1.0.0
+	 * @return void
+	 */
+	public function handle_checkout_form() {
+		// Check if this is our gateway form submission
+		if ( empty( $_POST['tec_tc_gateway'] ) || $_POST['tec_tc_gateway'] !== 'mail-in' ) {
+			return;
+		}
+
+		// Verify nonce
+		if ( ! wp_verify_nonce( $_POST['tec_tickets_commerce_checkout_nonce'] ?? '', 'tec_tickets_commerce_checkout' ) ) {
+			wp_die( __( 'Security check failed.', 'event-tickets-mail-in' ) );
+		}
+
+		try {
+			// Get cart and process order directly
+			if ( ! class_exists( 'TEC\Tickets\Commerce\Module' ) ) {
+				wp_die( __( 'Commerce module not available.', 'event-tickets-mail-in' ) );
+			}
+			
+			// Get cart instance
+			$cart = tribe( \TEC\Tickets\Commerce\Cart::class );
+			
+			// Check if cart has items
+			if ( ! $cart->has_items() ) {
+				wp_redirect( add_query_arg( 'tec_tc_error', urlencode( __( 'Your cart is empty.', 'event-tickets-mail-in' ) ), wp_get_referer() ) );
+				exit;
+			}
+			
+			// Get purchaser data from form
+			$purchaser_data = [
+				'purchaser_name' => sanitize_text_field( $_POST['purchaser_name'] ?? '' ),
+				'purchaser_email' => sanitize_email( $_POST['purchaser_email'] ?? '' ),
+			];
+			
+			// Validate required fields
+			if ( empty( $purchaser_data['purchaser_name'] ) ) {
+				wp_redirect( add_query_arg( 'tec_tc_error', urlencode( __( 'Full name is required.', 'event-tickets-mail-in' ) ), wp_get_referer() ) );
+				exit;
+			}
+			
+			if ( empty( $purchaser_data['purchaser_email'] ) ) {
+				wp_redirect( add_query_arg( 'tec_tc_error', urlencode( __( 'Email address is required.', 'event-tickets-mail-in' ) ), wp_get_referer() ) );
+				exit;
+			}
+			
+			// Get the Mail-In gateway
+			$gateway = $this->container->make( Gateway::class );
+			
+			// Process payment through gateway
+			$result = $gateway->process_payment( $purchaser_data );
+			
+			if ( ! $result['success'] ) {
+				// Handle error
+				wp_redirect( add_query_arg( 'tec_tc_error', urlencode( $result['message'] ), wp_get_referer() ) );
+				exit;
+			}
+			
+			// Success - redirect to success page
+			if ( isset( $result['redirect_url'] ) ) {
+				wp_redirect( $result['redirect_url'] );
+				exit;
+			}
+			
+		} catch ( \Exception $e ) {
+			wp_redirect( add_query_arg( 'tec_tc_error', urlencode( $e->getMessage() ), wp_get_referer() ) );
+			exit;
+		}
+	}
+
+	/**
+	 * Register frontend assets
+	 *
+	 * @since 1.0.0
+	 * @return void
+	 */
+	protected function register_frontend_assets() {
+		add_action( 'wp_enqueue_scripts', [ $this, 'enqueue_frontend_assets' ] );
+	}
+
+	/**
+	 * Enqueue frontend assets
+	 *
+	 * @since 1.0.0
+	 * @return void
+	 */
+	public function enqueue_frontend_assets() {
+		// Only load on pages that might have the checkout shortcode
+		if ( ! $this->should_load_frontend_assets() ) {
+			return;
+		}
+
+		wp_enqueue_style(
+			'et-mail-in-checkout',
+			ET_MAIL_IN_URL . 'assets/css/checkout.css',
+			[],
+			ET_MAIL_IN_VERSION
+		);
+
+		wp_enqueue_script(
+			'et-mail-in-checkout',
+			ET_MAIL_IN_URL . 'assets/js/checkout.js',
+			[],
+			ET_MAIL_IN_VERSION,
+			true
+		);
+	}
+
+	/**
+	 * Check if we should load frontend assets
+	 *
+	 * @since 1.0.0
+	 * @return bool
+	 */
+	protected function should_load_frontend_assets() {
+		global $post;
+
+		// Load on posts/pages with checkout shortcode
+		if ( $post && has_shortcode( $post->post_content, 'tec_tickets_checkout' ) ) {
+			return true;
+		}
+
+		// Load on checkout pages (if using different URL structure)
+		if ( is_page() && ( 
+			strpos( get_the_title(), 'checkout' ) !== false || 
+			strpos( get_the_title(), 'Checkout' ) !== false 
+		) ) {
+			return true;
+		}
+
+		// Load on pages that might contain Event Tickets Commerce elements
+		if ( is_page() && class_exists( 'TEC\Tickets\Commerce\Module' ) ) {
+			// Check if page content contains commerce-related content
+			if ( $post && ( 
+				strpos( $post->post_content, 'tec_tickets' ) !== false ||
+				strpos( $post->post_content, 'tribe_events' ) !== false 
+			) ) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+}
\ No newline at end of file
diff --git a/src/Settings.php b/src/Settings.php
new file mode 100644
index 0000000..c002ab7
--- /dev/null
+++ b/src/Settings.php
@@ -0,0 +1,410 @@
+<?php
+
+namespace ET_Mail_In_Payment;
+
+use TEC\Tickets\Commerce\Gateways\Contracts\Abstract_Settings;
+use Tribe__Tickets__Main;
+
+/**
+ * Mail-In Payment Settings class
+ *
+ * @since 1.0.0
+ */
+class Settings extends Abstract_Settings {
+
+	/**
+	 * @inheritDoc
+	 */
+	public static $option_sandbox = 'et-mail-in-sandbox';
+
+	/**
+	 * Settings option prefix
+	 *
+	 * @since 1.0.0
+	 * @var string
+	 */
+	protected static string $option_prefix = 'et_mail_in_';
+
+	/**
+	 * Get the list of settings for the gateway
+	 *
+	 * @since 1.0.0
+	 * @return array The list of settings for the gateway
+	 */
+	public function get_settings() {
+		// Return the actual settings fields that integrate with Tribe's settings system
+		return $this->get_settings_fields();
+	}
+
+	/**
+	 * Get the HTML for the connection box in the admin
+	 *
+	 * @since 1.0.0
+	 * @return string
+	 */
+	public function get_connection_settings_html() {
+		$status = $this->get_connection_status();
+		
+		$html = '<div class="tec-settings-form__element">';
+		$html .= '<h3>' . esc_html__( 'Mail-In Payment (Check)', 'event-tickets-mail-in' ) . '</h3>';
+		$html .= '<p class="description">' . esc_html( $status['message'] ) . '</p>';
+		
+		if ( ! $status['is_active'] ) {
+			$html .= '<p class="description">' . esc_html__( 'Configure the settings below to enable this payment method.', 'event-tickets-mail-in' ) . '</p>';
+		}
+		
+		$html .= '</div>';
+		
+		return $html;
+	}
+
+	/**
+	 * Get settings fields for internal use
+	 *
+	 * @since 1.0.0
+	 * @return array
+	 */
+	public function get_settings_fields() {
+		$fields = [
+			'mail_in_section' => [
+				'type' => 'html',
+				'html' => '<h3>' . __( 'Mail-In Payment (Check) Settings', 'event-tickets-mail-in' ) . '</h3>',
+			],
+			'tickets-commerce-mail-in-enabled' => [
+				'type' => 'checkbox_bool',
+				'label' => __( 'Enable Mail-In Payments', 'event-tickets-mail-in' ),
+				'tooltip' => __( 'Enable this payment method to allow customers to pay by mailing checks.', 'event-tickets-mail-in' ),
+				'default' => false,
+				'validation_type' => 'boolean',
+			],
+			'tickets-commerce-mail-in-title' => [
+				'type' => 'text',
+				'label' => __( 'Payment Method Title', 'event-tickets-mail-in' ),
+				'tooltip' => __( 'This is the title customers will see during checkout.', 'event-tickets-mail-in' ),
+				'default' => __( 'Mail-In Payment (Check)', 'event-tickets-mail-in' ),
+				'validation_type' => 'html',
+				'size' => 'large',
+			],
+			'tickets-commerce-mail-in-description' => [
+				'type' => 'textarea',
+				'label' => __( 'Payment Method Description', 'event-tickets-mail-in' ),
+				'tooltip' => __( 'Brief description shown to customers during checkout.', 'event-tickets-mail-in' ),
+				'default' => __( 'Pay by mailing a check to our address.', 'event-tickets-mail-in' ),
+				'validation_type' => 'html',
+				'size' => 'large',
+			],
+			'tickets-commerce-mail-in-payable-to' => [
+				'type' => 'text',
+				'label' => __( 'Make Check Payable To', 'event-tickets-mail-in' ),
+				'tooltip' => __( 'The name or organization that checks should be made payable to.', 'event-tickets-mail-in' ),
+				'default' => '',
+				'validation_type' => 'html',
+				'size' => 'large',
+				'required' => true,
+			],
+			'tickets-commerce-mail-in-address' => [
+				'type' => 'textarea',
+				'label' => __( 'Mailing Address', 'event-tickets-mail-in' ),
+				'tooltip' => __( 'The complete mailing address where checks should be sent.', 'event-tickets-mail-in' ),
+				'default' => '',
+				'validation_type' => 'html',
+				'size' => 'large',
+				'required' => true,
+			],
+			'tickets-commerce-mail-in-instructions' => [
+				'type' => 'textarea',
+				'label' => __( 'Payment Instructions', 'event-tickets-mail-in' ),
+				'tooltip' => __( 'Detailed instructions for customers on how to complete their payment.', 'event-tickets-mail-in' ),
+				'default' => __( 'Please mail your check to the address provided below. Your tickets will be reserved for 7 days while we wait for your payment to arrive. Include your order number on the check memo line.', 'event-tickets-mail-in' ),
+				'validation_type' => 'html',
+				'size' => 'large',
+			],
+			'tickets-commerce-mail-in-reservation-days' => [
+				'type' => 'text',
+				'label' => __( 'Reservation Period (Days)', 'event-tickets-mail-in' ),
+				'tooltip' => __( 'Number of days to hold tickets while waiting for check payment.', 'event-tickets-mail-in' ),
+				'default' => '7',
+				'validation_type' => 'int',
+				'size' => 'small',
+			],
+			'tickets-commerce-mail-in-auto-cancel' => [
+				'type' => 'checkbox_bool',
+				'label' => __( 'Auto-Cancel Expired Orders', 'event-tickets-mail-in' ),
+				'tooltip' => __( 'Automatically cancel orders if payment is not received within the reservation period.', 'event-tickets-mail-in' ),
+				'default' => false,
+				'validation_type' => 'boolean',
+			],
+		];
+
+		return $fields;
+	}
+
+	/**
+	 * Get the settings section for the Payments tab
+	 *
+	 * @since 1.0.0
+	 * @return array
+	 */
+	public function get_settings_section() {
+		return [
+			'mail_in_payment_settings' => [
+				'priority' => 30,
+				'fields' => $this->get_settings_fields(),
+			],
+		];
+	}
+
+	/**
+	 * Validate settings before saving
+	 *
+	 * @since 1.0.0
+	 * @param array $input Settings input
+	 * @param array $field Field configuration
+	 * @return mixed
+	 */
+	public function validate_settings_field( $input, $field ) {
+		switch ( $field['validation_type'] ?? 'html' ) {
+			case 'boolean':
+				return (bool) $input;
+			
+			case 'int':
+				return max( 1, absint( $input ) );
+			
+			case 'html':
+			default:
+				return wp_kses_post( $input );
+		}
+	}
+
+	/**
+	 * Add custom validation for required fields
+	 *
+	 * @since 1.0.0
+	 * @param array $input All settings input
+	 * @return array
+	 */
+	public function validate_settings( $input ) {
+		$validated = [];
+		$errors = [];
+
+		foreach ( $this->get_settings_fields() as $key => $field ) {
+			$value = $input[ $key ] ?? $field['default'] ?? '';
+			
+			// Check required fields
+			if ( ! empty( $field['required'] ) && empty( $value ) ) {
+				$errors[] = sprintf(
+					__( '%s is required.', 'event-tickets-mail-in' ),
+					$field['label']
+				);
+				continue;
+			}
+
+			$validated[ $key ] = $this->validate_settings_field( $value, $field );
+		}
+
+		// Display errors if any
+		if ( ! empty( $errors ) ) {
+			add_settings_error(
+				'et_mail_in_settings',
+				'validation_error',
+				implode( ' ', $errors ),
+				'error'
+			);
+		}
+
+		return $validated;
+	}
+
+	/**
+	 * Get connection status for admin display
+	 *
+	 * @since 1.0.0
+	 * @return array
+	 */
+	public function get_connection_status() {
+		$address = tribe_get_option( 'tickets-commerce-mail-in-address', '' );
+		$payable_to = tribe_get_option( 'tickets-commerce-mail-in-payable-to', '' );
+		$enabled = tribe_get_option( 'tickets-commerce-mail-in-enabled', false );
+
+		$is_connected = ! empty( $address ) && ! empty( $payable_to );
+
+		$status = [
+			'is_connected' => $is_connected,
+			'is_enabled' => $enabled,
+			'is_active' => $enabled && $is_connected,
+		];
+
+		if ( $is_connected ) {
+			$status['message'] = __( 'Mail-in payment gateway is properly configured.', 'event-tickets-mail-in' );
+			$status['status'] = 'success';
+		} else {
+			$missing = [];
+			if ( empty( $address ) ) {
+				$missing[] = __( 'Mailing Address', 'event-tickets-mail-in' );
+			}
+			if ( empty( $payable_to ) ) {
+				$missing[] = __( 'Check Payable To', 'event-tickets-mail-in' );
+			}
+
+			$status['message'] = sprintf(
+				__( 'Please configure the following required fields: %s', 'event-tickets-mail-in' ),
+				implode( ', ', $missing )
+			);
+			$status['status'] = 'error';
+		}
+
+		return $status;
+	}
+
+
+	/**
+	 * Register settings with WordPress
+	 *
+	 * @since 1.0.0
+	 * @return void
+	 */
+	public function register_settings() {
+		foreach ( $this->get_settings_fields() as $key => $field ) {
+			if ( $field['type'] === 'html' ) {
+				continue; // Skip HTML fields
+			}
+
+			register_setting(
+				'et_mail_in_settings',
+				$key,
+				[
+					'type' => $this->get_wp_setting_type( $field['validation_type'] ?? 'string' ),
+					'sanitize_callback' => [ $this, 'validate_settings_field' ],
+					'default' => $field['default'] ?? '',
+				]
+			);
+		}
+	}
+
+	/**
+	 * Convert validation type to WordPress setting type
+	 *
+	 * @since 1.0.0
+	 * @param string $validation_type
+	 * @return string
+	 */
+	protected function get_wp_setting_type( $validation_type ) {
+		switch ( $validation_type ) {
+			case 'boolean':
+				return 'boolean';
+			case 'int':
+				return 'integer';
+			default:
+				return 'string';
+		}
+	}
+
+	/**
+	 * Render settings template
+	 *
+	 * @since 1.0.0
+	 * @param array $context Template context
+	 * @return string
+	 */
+	protected function render_settings_template( $context ) {
+		$gateway = $context['gateway'];
+		$status = $context['connection_status'];
+		$fields = $this->get_settings_fields();
+
+		ob_start();
+		?>
+		<div class="tec-settings-form__element tec-settings-form__element--full-width">
+			<div class="tec-tickets__admin-settings-tickets-commerce-gateway-wrapper">
+				
+				<!-- Gateway Status -->
+				<div class="tec-tickets__admin-settings-tickets-commerce-gateway-status">
+					<div class="tec-tickets__admin-settings-tickets-commerce-gateway-status-icon">
+						<?php if ( $status['is_active'] ) : ?>
+							<span class="dashicons dashicons-yes-alt" style="color: #46b450;"></span>
+						<?php else : ?>
+							<span class="dashicons dashicons-warning" style="color: #ffb900;"></span>
+						<?php endif; ?>
+					</div>
+					<div class="tec-tickets__admin-settings-tickets-commerce-gateway-status-text">
+						<h3><?php echo esc_html( $gateway::get_label() ); ?></h3>
+						<p class="description">
+							<?php echo esc_html( $status['message'] ); ?>
+						</p>
+						<?php if ( ! $status['is_active'] ) : ?>
+							<p class="description">
+								<?php esc_html_e( 'Configure the settings below to enable this payment method.', 'event-tickets-mail-in' ); ?>
+							</p>
+						<?php endif; ?>
+					</div>
+				</div>
+
+				<!-- Settings Form -->
+				<div class="tec-tickets__admin-settings-tickets-commerce-gateway-settings">
+					<table class="form-table">
+						<tbody>
+							<?php foreach ( $fields as $field_key => $field ) : ?>
+								<?php if ( $field['type'] === 'html' ) : ?>
+									<tr>
+										<td colspan="2"><?php echo wp_kses_post( $field['html'] ); ?></td>
+									</tr>
+								<?php else : ?>
+									<tr>
+										<th scope="row">
+											<label for="<?php echo esc_attr( $field_key ); ?>">
+												<?php echo esc_html( $field['label'] ); ?>
+												<?php if ( ! empty( $field['required'] ) ) : ?>
+													<span class="required" style="color: #d63638;">*</span>
+												<?php endif; ?>
+											</label>
+										</th>
+										<td>
+											<?php $this->render_field( $field_key, $field ); ?>
+											<?php if ( ! empty( $field['tooltip'] ) ) : ?>
+												<p class="description"><?php echo esc_html( $field['tooltip'] ); ?></p>
+											<?php endif; ?>
+										</td>
+									</tr>
+								<?php endif; ?>
+							<?php endforeach; ?>
+						</tbody>
+					</table>
+				</div>
+			</div>
+		</div>
+		<?php
+		return ob_get_clean();
+	}
+
+	/**
+	 * Render individual field
+	 *
+	 * @since 1.0.0
+	 * @param string $field_key Field key
+	 * @param array $field Field configuration
+	 * @return void
+	 */
+	protected function render_field( $field_key, $field ) {
+		$value = tribe_get_option( $field_key, $field['default'] ?? '' );
+		$size_class = ! empty( $field['size'] ) ? 'class="' . esc_attr( $field['size'] ) . '-text"' : '';
+
+		switch ( $field['type'] ) {
+			case 'checkbox_bool':
+				echo '<label>';
+				echo '<input type="checkbox" name="' . esc_attr( $field_key ) . '" value="1" ' . checked( $value, true, false ) . ' />';
+				echo ' ' . esc_html( $field['label'] );
+				echo '</label>';
+				break;
+
+			case 'textarea':
+				echo '<textarea name="' . esc_attr( $field_key ) . '" rows="4" cols="50" ' . $size_class . '>';
+				echo esc_textarea( $value );
+				echo '</textarea>';
+				break;
+
+			case 'text':
+			default:
+				echo '<input type="text" name="' . esc_attr( $field_key ) . '" value="' . esc_attr( $value ) . '" ' . $size_class . ' />';
+				break;
+		}
+	}
+}
\ No newline at end of file
diff --git a/templates/admin/mail-in-orders.php b/templates/admin/mail-in-orders.php
new file mode 100644
index 0000000..7940456
--- /dev/null
+++ b/templates/admin/mail-in-orders.php
@@ -0,0 +1,315 @@
+<?php
+/**
+ * Admin page for managing mail-in payment orders
+ *
+ * @since 1.0.0
+ * @var \WP_Query $pending_orders Query object with pending orders
+ */
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+?>
+
+<div class="wrap">
+	<h1><?php esc_html_e( 'Mail-In Payment Orders', 'event-tickets-mail-in' ); ?></h1>
+	
+	<div class="et-mail-in-admin-header">
+		<p><?php esc_html_e( 'Manage orders that are waiting for check payments to arrive.', 'event-tickets-mail-in' ); ?></p>
+	</div>
+
+	<?php if ( $pending_orders->have_posts() ) : ?>
+		<div class="et-mail-in-orders-table">
+			<table class="wp-list-table widefat fixed striped">
+				<thead>
+					<tr>
+						<th scope="col"><?php esc_html_e( 'Order', 'event-tickets-mail-in' ); ?></th>
+						<th scope="col"><?php esc_html_e( 'Customer', 'event-tickets-mail-in' ); ?></th>
+						<th scope="col"><?php esc_html_e( 'Event', 'event-tickets-mail-in' ); ?></th>
+						<th scope="col"><?php esc_html_e( 'Amount', 'event-tickets-mail-in' ); ?></th>
+						<th scope="col"><?php esc_html_e( 'Date', 'event-tickets-mail-in' ); ?></th>
+						<th scope="col"><?php esc_html_e( 'Status', 'event-tickets-mail-in' ); ?></th>
+						<th scope="col"><?php esc_html_e( 'Actions', 'event-tickets-mail-in' ); ?></th>
+					</tr>
+				</thead>
+				<tbody>
+					<?php 
+					$order_controller = new \ET_Mail_In_Payment\Order();
+					while ( $pending_orders->have_posts() ) : 
+						$pending_orders->the_post(); 
+						$order_id = get_the_ID();
+						$order = tribe( 'tickets.commerce.order' )->get_by_id( $order_id );
+						$details = $order_controller->get_mail_in_details( $order_id );
+						$created_date = get_post_meta( $order_id, '_mail_in_created_date', true );
+						$event_id = get_post_meta( $order_id, '_tec_tc_order_event_id', true );
+						$event_title = $event_id ? get_the_title( $event_id ) : __( 'N/A', 'event-tickets-mail-in' );
+					?>
+					<tr>
+						<td>
+							<strong>
+								<a href="<?php echo esc_url( admin_url( 'post.php?post=' . $order_id . '&action=edit' ) ); ?>">
+									#<?php echo esc_html( $order->get_order_number() ); ?>
+								</a>
+							</strong>
+						</td>
+						<td>
+							<?php echo esc_html( $order->get_purchaser_name() ); ?><br>
+							<small><?php echo esc_html( $order->get_purchaser_email() ); ?></small>
+						</td>
+						<td>
+							<?php if ( $event_id ) : ?>
+								<a href="<?php echo esc_url( admin_url( 'post.php?post=' . $event_id . '&action=edit' ) ); ?>">
+									<?php echo esc_html( $event_title ); ?>
+								</a>
+							<?php else : ?>
+								<?php echo esc_html( $event_title ); ?>
+							<?php endif; ?>
+						</td>
+						<td>
+							<strong><?php echo esc_html( $order->get_total_value()->get_formatted() ); ?></strong>
+						</td>
+						<td>
+							<?php echo esc_html( date_i18n( get_option( 'date_format' ), strtotime( $created_date ) ) ); ?>
+							<br><small><?php echo esc_html( human_time_diff( strtotime( $created_date ), current_time( 'timestamp' ) ) . ' ago' ); ?></small>
+						</td>
+						<td>
+							<span class="et-mail-in-status et-mail-in-status--pending">
+								<?php esc_html_e( 'Awaiting Payment', 'event-tickets-mail-in' ); ?>
+							</span>
+						</td>
+						<td>
+							<div class="et-mail-in-actions">
+								<button type="button" class="button button-secondary et-mail-in-mark-received" 
+										data-order-id="<?php echo esc_attr( $order_id ); ?>"
+										data-order-number="<?php echo esc_attr( $order->get_order_number() ); ?>">
+									<?php esc_html_e( 'Mark Received', 'event-tickets-mail-in' ); ?>
+								</button>
+								<button type="button" class="button button-secondary et-mail-in-mark-bounced" 
+										data-order-id="<?php echo esc_attr( $order_id ); ?>"
+										data-order-number="<?php echo esc_attr( $order->get_order_number() ); ?>">
+									<?php esc_html_e( 'Mark Bounced', 'event-tickets-mail-in' ); ?>
+								</button>
+							</div>
+						</td>
+					</tr>
+					<?php endwhile; ?>
+				</tbody>
+			</table>
+		</div>
+
+		<?php
+		// Pagination
+		$pagination = paginate_links( [
+			'total' => $pending_orders->max_num_pages,
+			'current' => max( 1, get_query_var( 'paged' ) ),
+			'format' => '?paged=%#%',
+			'prev_text' => __( '&laquo; Previous', 'event-tickets-mail-in' ),
+			'next_text' => __( 'Next &raquo;', 'event-tickets-mail-in' ),
+		] );
+
+		if ( $pagination ) {
+			echo '<div class="tablenav bottom">';
+			echo '<div class="tablenav-pages">' . $pagination . '</div>';
+			echo '</div>';
+		}
+		?>
+
+	<?php else : ?>
+		<div class="et-mail-in-no-orders">
+			<p><?php esc_html_e( 'No pending mail-in payment orders found.', 'event-tickets-mail-in' ); ?></p>
+		</div>
+	<?php endif; ?>
+
+	<?php wp_reset_postdata(); ?>
+</div>
+
+<!-- Mark Received Modal -->
+<div id="et-mail-in-received-modal" class="et-mail-in-modal" style="display: none;">
+	<div class="et-mail-in-modal-content">
+		<span class="et-mail-in-modal-close">&times;</span>
+		<h2><?php esc_html_e( 'Mark Check as Received', 'event-tickets-mail-in' ); ?></h2>
+		<form method="post" action="<?php echo esc_url( admin_url( 'admin-post.php' ) ); ?>">
+			<input type="hidden" name="action" value="mark_check_received">
+			<input type="hidden" name="order_id" id="received-order-id">
+			<input type="hidden" name="nonce" value="<?php echo esc_attr( wp_create_nonce( 'et_mail_in_admin' ) ); ?>">
+			<input type="hidden" name="redirect_url" value="<?php echo esc_url( admin_url( 'edit.php?post_type=tec_tc_order&page=mail-in-payments' ) ); ?>">
+			
+			<p id="received-order-info"></p>
+			
+			<label for="received-notes"><?php esc_html_e( 'Notes (optional):', 'event-tickets-mail-in' ); ?></label>
+			<textarea name="notes" id="received-notes" rows="3" style="width: 100%;"></textarea>
+			
+			<div class="et-mail-in-modal-actions">
+				<button type="submit" class="button button-primary">
+					<?php esc_html_e( 'Mark as Received', 'event-tickets-mail-in' ); ?>
+				</button>
+				<button type="button" class="button et-mail-in-modal-cancel">
+					<?php esc_html_e( 'Cancel', 'event-tickets-mail-in' ); ?>
+				</button>
+			</div>
+		</form>
+	</div>
+</div>
+
+<!-- Mark Bounced Modal -->
+<div id="et-mail-in-bounced-modal" class="et-mail-in-modal" style="display: none;">
+	<div class="et-mail-in-modal-content">
+		<span class="et-mail-in-modal-close">&times;</span>
+		<h2><?php esc_html_e( 'Mark Check as Bounced', 'event-tickets-mail-in' ); ?></h2>
+		<form method="post" action="<?php echo esc_url( admin_url( 'admin-post.php' ) ); ?>">
+			<input type="hidden" name="action" value="mark_check_bounced">
+			<input type="hidden" name="order_id" id="bounced-order-id">
+			<input type="hidden" name="nonce" value="<?php echo esc_attr( wp_create_nonce( 'et_mail_in_admin' ) ); ?>">
+			<input type="hidden" name="redirect_url" value="<?php echo esc_url( admin_url( 'edit.php?post_type=tec_tc_order&page=mail-in-payments' ) ); ?>">
+			
+			<p id="bounced-order-info"></p>
+			
+			<label for="bounced-reason"><?php esc_html_e( 'Reason for bounce:', 'event-tickets-mail-in' ); ?></label>
+			<textarea name="reason" id="bounced-reason" rows="3" style="width: 100%;" required></textarea>
+			
+			<div class="et-mail-in-modal-actions">
+				<button type="submit" class="button button-primary">
+					<?php esc_html_e( 'Mark as Bounced', 'event-tickets-mail-in' ); ?>
+				</button>
+				<button type="button" class="button et-mail-in-modal-cancel">
+					<?php esc_html_e( 'Cancel', 'event-tickets-mail-in' ); ?>
+				</button>
+			</div>
+		</form>
+	</div>
+</div>
+
+<style>
+.et-mail-in-admin-header {
+	background: #f1f1f1;
+	padding: 15px;
+	border-radius: 4px;
+	margin: 20px 0;
+}
+
+.et-mail-in-orders-table {
+	margin-top: 20px;
+}
+
+.et-mail-in-status {
+	padding: 4px 8px;
+	border-radius: 3px;
+	font-size: 12px;
+	font-weight: bold;
+	text-transform: uppercase;
+}
+
+.et-mail-in-status--pending {
+	background: #fff3cd;
+	color: #856404;
+	border: 1px solid #ffeaa7;
+}
+
+.et-mail-in-actions {
+	display: flex;
+	gap: 5px;
+	flex-wrap: wrap;
+}
+
+.et-mail-in-actions .button {
+	font-size: 11px;
+	padding: 2px 8px;
+	height: auto;
+}
+
+.et-mail-in-no-orders {
+	text-align: center;
+	padding: 40px;
+	background: #f9f9f9;
+	border-radius: 4px;
+	margin: 20px 0;
+}
+
+.et-mail-in-modal {
+	position: fixed;
+	z-index: 1000;
+	left: 0;
+	top: 0;
+	width: 100%;
+	height: 100%;
+	background-color: rgba(0,0,0,0.5);
+}
+
+.et-mail-in-modal-content {
+	background-color: #fefefe;
+	margin: 10% auto;
+	padding: 20px;
+	border-radius: 4px;
+	width: 80%;
+	max-width: 500px;
+	position: relative;
+}
+
+.et-mail-in-modal-close {
+	position: absolute;
+	right: 15px;
+	top: 15px;
+	font-size: 28px;
+	font-weight: bold;
+	cursor: pointer;
+}
+
+.et-mail-in-modal-close:hover {
+	color: #999;
+}
+
+.et-mail-in-modal-actions {
+	margin-top: 20px;
+	display: flex;
+	gap: 10px;
+	justify-content: flex-end;
+}
+
+.et-mail-in-modal h2 {
+	margin-top: 0;
+}
+
+.et-mail-in-modal label {
+	display: block;
+	margin: 15px 0 5px 0;
+	font-weight: bold;
+}
+</style>
+
+<script>
+jQuery(document).ready(function($) {
+	// Handle mark received button
+	$('.et-mail-in-mark-received').on('click', function() {
+		var orderId = $(this).data('order-id');
+		var orderNumber = $(this).data('order-number');
+		
+		$('#received-order-id').val(orderId);
+		$('#received-order-info').text('Mark check as received for Order #' + orderNumber + '?');
+		$('#et-mail-in-received-modal').show();
+	});
+
+	// Handle mark bounced button
+	$('.et-mail-in-mark-bounced').on('click', function() {
+		var orderId = $(this).data('order-id');
+		var orderNumber = $(this).data('order-number');
+		
+		$('#bounced-order-id').val(orderId);
+		$('#bounced-order-info').text('Mark check as bounced for Order #' + orderNumber + '?');
+		$('#et-mail-in-bounced-modal').show();
+	});
+
+	// Handle modal close
+	$('.et-mail-in-modal-close, .et-mail-in-modal-cancel').on('click', function() {
+		$('.et-mail-in-modal').hide();
+		$('textarea').val('');
+	});
+
+	// Close modal when clicking outside
+	$(window).on('click', function(event) {
+		if ($(event.target).hasClass('et-mail-in-modal')) {
+			$('.et-mail-in-modal').hide();
+			$('textarea').val('');
+		}
+	});
+});
+</script>
\ No newline at end of file
diff --git a/templates/admin/order-meta-box.php b/templates/admin/order-meta-box.php
new file mode 100644
index 0000000..a9b05b7
--- /dev/null
+++ b/templates/admin/order-meta-box.php
@@ -0,0 +1,218 @@
+<?php
+/**
+ * Order meta box template for mail-in payments
+ *
+ * @since 1.0.0
+ * @var \WP_Post $post Order post object
+ * @var array $details Mail-in payment details
+ */
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+?>
+
+<div class="et-mail-in-order-details">
+	<table class="form-table">
+		<tbody>
+			<tr>
+				<th scope="row"><?php esc_html_e( 'Payment Method', 'event-tickets-mail-in' ); ?></th>
+				<td><?php esc_html_e( 'Mail-In Payment (Check)', 'event-tickets-mail-in' ); ?></td>
+			</tr>
+
+			<tr>
+				<th scope="row"><?php esc_html_e( 'Check Status', 'event-tickets-mail-in' ); ?></th>
+				<td>
+					<?php if ( $details['check_received'] ) : ?>
+						<span class="et-mail-in-status et-mail-in-status--received">
+							<?php esc_html_e( 'Received', 'event-tickets-mail-in' ); ?>
+						</span>
+						<?php if ( $details['check_received_date'] ) : ?>
+							<br><small><?php echo esc_html( sprintf( __( 'Received on: %s', 'event-tickets-mail-in' ), date_i18n( get_option( 'date_format' ), strtotime( $details['check_received_date'] ) ) ) ); ?></small>
+						<?php endif; ?>
+					<?php elseif ( $details['check_bounced'] ) : ?>
+						<span class="et-mail-in-status et-mail-in-status--bounced">
+							<?php esc_html_e( 'Bounced', 'event-tickets-mail-in' ); ?>
+						</span>
+						<?php if ( $details['bounce_date'] ) : ?>
+							<br><small><?php echo esc_html( sprintf( __( 'Bounced on: %s', 'event-tickets-mail-in' ), date_i18n( get_option( 'date_format' ), strtotime( $details['bounce_date'] ) ) ) ); ?></small>
+						<?php endif; ?>
+					<?php else : ?>
+						<span class="et-mail-in-status et-mail-in-status--pending">
+							<?php esc_html_e( 'Awaiting Payment', 'event-tickets-mail-in' ); ?>
+						</span>
+					<?php endif; ?>
+				</td>
+			</tr>
+
+			<?php if ( $details['created_date'] ) : ?>
+			<tr>
+				<th scope="row"><?php esc_html_e( 'Order Created', 'event-tickets-mail-in' ); ?></th>
+				<td>
+					<?php echo esc_html( date_i18n( get_option( 'date_format' ) . ' ' . get_option( 'time_format' ), strtotime( $details['created_date'] ) ) ); ?>
+					<br><small><?php echo esc_html( human_time_diff( strtotime( $details['created_date'] ), current_time( 'timestamp' ) ) . ' ago' ); ?></small>
+				</td>
+			</tr>
+			<?php endif; ?>
+
+			<?php if ( $details['payable_to'] ) : ?>
+			<tr>
+				<th scope="row"><?php esc_html_e( 'Check Payable To', 'event-tickets-mail-in' ); ?></th>
+				<td><strong><?php echo esc_html( $details['payable_to'] ); ?></strong></td>
+			</tr>
+			<?php endif; ?>
+
+			<?php if ( $details['mailing_address'] ) : ?>
+			<tr>
+				<th scope="row"><?php esc_html_e( 'Mailing Address', 'event-tickets-mail-in' ); ?></th>
+				<td>
+					<div class="et-mail-in-address">
+						<?php echo wp_kses_post( nl2br( $details['mailing_address'] ) ); ?>
+					</div>
+				</td>
+			</tr>
+			<?php endif; ?>
+
+			<?php if ( $details['check_notes'] ) : ?>
+			<tr>
+				<th scope="row"><?php esc_html_e( 'Payment Notes', 'event-tickets-mail-in' ); ?></th>
+				<td><?php echo wp_kses_post( nl2br( $details['check_notes'] ) ); ?></td>
+			</tr>
+			<?php endif; ?>
+
+			<?php if ( $details['bounce_reason'] ) : ?>
+			<tr>
+				<th scope="row"><?php esc_html_e( 'Bounce Reason', 'event-tickets-mail-in' ); ?></th>
+				<td><?php echo wp_kses_post( nl2br( $details['bounce_reason'] ) ); ?></td>
+			</tr>
+			<?php endif; ?>
+		</tbody>
+	</table>
+
+	<?php if ( ! $details['check_received'] && ! $details['check_bounced'] ) : ?>
+	<div class="et-mail-in-actions">
+		<h4><?php esc_html_e( 'Payment Actions', 'event-tickets-mail-in' ); ?></h4>
+		<p><?php esc_html_e( 'Use these actions to update the payment status when you receive or process the check.', 'event-tickets-mail-in' ); ?></p>
+		
+		<div class="et-mail-in-action-buttons">
+			<button type="button" class="button button-primary et-mail-in-mark-received-single" 
+					data-order-id="<?php echo esc_attr( $post->ID ); ?>">
+				<?php esc_html_e( 'Mark Check as Received', 'event-tickets-mail-in' ); ?>
+			</button>
+			
+			<button type="button" class="button button-secondary et-mail-in-mark-bounced-single" 
+					data-order-id="<?php echo esc_attr( $post->ID ); ?>">
+				<?php esc_html_e( 'Mark Check as Bounced', 'event-tickets-mail-in' ); ?>
+			</button>
+		</div>
+	</div>
+	<?php endif; ?>
+</div>
+
+<style>
+.et-mail-in-order-details .form-table th {
+	width: 150px;
+	font-weight: 600;
+}
+
+.et-mail-in-status {
+	display: inline-block;
+	padding: 4px 8px;
+	border-radius: 3px;
+	font-size: 12px;
+	font-weight: bold;
+	text-transform: uppercase;
+}
+
+.et-mail-in-status--pending {
+	background: #fff3cd;
+	color: #856404;
+	border: 1px solid #ffeaa7;
+}
+
+.et-mail-in-status--received {
+	background: #d4edda;
+	color: #155724;
+	border: 1px solid #c3e6cb;
+}
+
+.et-mail-in-status--bounced {
+	background: #f8d7da;
+	color: #721c24;
+	border: 1px solid #f5c6cb;
+}
+
+.et-mail-in-address {
+	background: #f5f5f5;
+	padding: 10px;
+	border-radius: 4px;
+	border-left: 4px solid #0073aa;
+	line-height: 1.6;
+}
+
+.et-mail-in-actions {
+	margin-top: 20px;
+	padding-top: 20px;
+	border-top: 1px solid #ddd;
+}
+
+.et-mail-in-actions h4 {
+	margin: 0 0 10px 0;
+}
+
+.et-mail-in-action-buttons {
+	margin-top: 15px;
+}
+
+.et-mail-in-action-buttons .button {
+	margin-right: 10px;
+}
+</style>
+
+<script>
+jQuery(document).ready(function($) {
+	$('.et-mail-in-mark-received-single').on('click', function() {
+		var orderId = $(this).data('order-id');
+		var notes = prompt('<?php echo esc_js( __( 'Optional notes about the received check:', 'event-tickets-mail-in' ) ); ?>');
+		
+		if (notes !== null) { // User didn't cancel
+			var form = $('<form>', {
+				'method': 'POST',
+				'action': '<?php echo esc_url( admin_url( 'admin-post.php' ) ); ?>'
+			});
+			
+			form.append($('<input>', {'type': 'hidden', 'name': 'action', 'value': 'mark_check_received'}));
+			form.append($('<input>', {'type': 'hidden', 'name': 'order_id', 'value': orderId}));
+			form.append($('<input>', {'type': 'hidden', 'name': 'notes', 'value': notes}));
+			form.append($('<input>', {'type': 'hidden', 'name': 'nonce', 'value': '<?php echo esc_attr( wp_create_nonce( 'et_mail_in_admin' ) ); ?>'}));
+			form.append($('<input>', {'type': 'hidden', 'name': 'redirect_url', 'value': window.location.href}));
+			
+			$('body').append(form);
+			form.submit();
+		}
+	});
+
+	$('.et-mail-in-mark-bounced-single').on('click', function() {
+		var orderId = $(this).data('order-id');
+		var reason = prompt('<?php echo esc_js( __( 'Reason for check bounce (required):', 'event-tickets-mail-in' ) ); ?>');
+		
+		if (reason && reason.trim() !== '') {
+			var form = $('<form>', {
+				'method': 'POST',
+				'action': '<?php echo esc_url( admin_url( 'admin-post.php' ) ); ?>'
+			});
+			
+			form.append($('<input>', {'type': 'hidden', 'name': 'action', 'value': 'mark_check_bounced'}));
+			form.append($('<input>', {'type': 'hidden', 'name': 'order_id', 'value': orderId}));
+			form.append($('<input>', {'type': 'hidden', 'name': 'reason', 'value': reason}));
+			form.append($('<input>', {'type': 'hidden', 'name': 'nonce', 'value': '<?php echo esc_attr( wp_create_nonce( 'et_mail_in_admin' ) ); ?>'}));
+			form.append($('<input>', {'type': 'hidden', 'name': 'redirect_url', 'value': window.location.href}));
+			
+			$('body').append(form);
+			form.submit();
+		} else if (reason !== null) {
+			alert('<?php echo esc_js( __( 'Please provide a reason for the bounce.', 'event-tickets-mail-in' ) ); ?>');
+		}
+	});
+});
+</script>
\ No newline at end of file
diff --git a/templates/checkout/mail-in-form.php b/templates/checkout/mail-in-form.php
new file mode 100644
index 0000000..52b06a2
--- /dev/null
+++ b/templates/checkout/mail-in-form.php
@@ -0,0 +1,151 @@
+<?php
+/**
+ * Mail-In Payment checkout form template
+ *
+ * @since 1.0.0
+ * @var array $args Template arguments
+ * @var \ET_Mail_In_Payment\Gateway $gateway Gateway instance
+ * @var string $instructions Payment instructions
+ * @var string $mailing_address Mailing address
+ * @var string $payable_to Check payable to
+ */
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+$gateway = $args['gateway'] ?? null;
+$instructions = $args['instructions'] ?? '';
+$mailing_address = $args['mailing_address'] ?? '';
+$payable_to = $args['payable_to'] ?? '';
+?>
+
+<div class="tribe-tickets-commerce-gateway-mail-in">
+	<div class="tribe-tickets-commerce-gateway-mail-in__header">
+		<h3><?php echo esc_html( $gateway::get_label() ); ?></h3>
+		<p class="tribe-tickets-commerce-gateway-mail-in__description">
+			<?php echo esc_html( $gateway::get_description() ); ?>
+		</p>
+	</div>
+
+	<div class="tribe-tickets-commerce-gateway-mail-in__instructions">
+		<?php if ( $instructions ) : ?>
+			<div class="tribe-tickets-commerce-gateway-mail-in__instructions-text">
+				<h4><?php esc_html_e( 'Payment Instructions:', 'event-tickets-mail-in' ); ?></h4>
+				<p><?php echo wp_kses_post( nl2br( $instructions ) ); ?></p>
+			</div>
+		<?php endif; ?>
+
+		<div class="tribe-tickets-commerce-gateway-mail-in__details">
+			<?php if ( $payable_to ) : ?>
+				<div class="tribe-tickets-commerce-gateway-mail-in__payable-to">
+					<h4><?php esc_html_e( 'Make Check Payable To:', 'event-tickets-mail-in' ); ?></h4>
+					<p class="tribe-tickets-commerce-gateway-mail-in__payable-to-name">
+						<strong><?php echo esc_html( $payable_to ); ?></strong>
+					</p>
+				</div>
+			<?php endif; ?>
+
+			<?php if ( $mailing_address ) : ?>
+				<div class="tribe-tickets-commerce-gateway-mail-in__address">
+					<h4><?php esc_html_e( 'Mail Your Check To:', 'event-tickets-mail-in' ); ?></h4>
+					<div class="tribe-tickets-commerce-gateway-mail-in__address-block">
+						<?php echo wp_kses_post( nl2br( $mailing_address ) ); ?>
+					</div>
+				</div>
+			<?php endif; ?>
+		</div>
+
+		<div class="tribe-tickets-commerce-gateway-mail-in__important-note">
+			<h4><?php esc_html_e( 'Important Notes:', 'event-tickets-mail-in' ); ?></h4>
+			<ul>
+				<li><?php esc_html_e( 'Please include your order number in the check memo line.', 'event-tickets-mail-in' ); ?></li>
+				<li><?php esc_html_e( 'Your tickets will be reserved while we wait for your payment to arrive.', 'event-tickets-mail-in' ); ?></li>
+				<li><?php esc_html_e( 'You will receive a confirmation email once your payment is processed.', 'event-tickets-mail-in' ); ?></li>
+			</ul>
+		</div>
+	</div>
+
+	<style>
+		.tribe-tickets-commerce-gateway-mail-in {
+			border: 1px solid #ddd;
+			padding: 20px;
+			margin: 15px 0 !important;
+			background: #f9f9f9;
+			border-radius: 4px;
+		}
+
+		.tribe-tickets-commerce-gateway-mail-in__header h3 {
+			margin: 0 0 10px 0;
+			color: #333;
+		}
+
+		.tribe-tickets-commerce-gateway-mail-in__description {
+			margin: 0 0 20px 0;
+			font-style: italic;
+			color: #666;
+		}
+
+		.tribe-tickets-commerce-gateway-mail-in__instructions {
+			background: #fff;
+			padding: 20px;
+			border-radius: 4px;
+			border: 1px solid #e5e5e5;
+		}
+
+		.tribe-tickets-commerce-gateway-mail-in__instructions h4 {
+			margin: 0 0 10px 0;
+			color: #333;
+			font-size: 16px;
+		}
+
+		.tribe-tickets-commerce-gateway-mail-in__details {
+			display: grid;
+			grid-template-columns: 1fr 1fr;
+			gap: 20px;
+			margin: 20px 0;
+		}
+
+		@media (max-width: 768px) {
+			.tribe-tickets-commerce-gateway-mail-in__details {
+				grid-template-columns: 1fr;
+			}
+		}
+
+		.tribe-tickets-commerce-gateway-mail-in__payable-to-name {
+			font-size: 18px;
+			margin: 5px 0;
+		}
+
+		.tribe-tickets-commerce-gateway-mail-in__address-block {
+			background: #f5f5f5;
+			padding: 15px;
+			border-radius: 4px;
+			border-left: 4px solid #0073aa;
+			line-height: 1.6;
+		}
+
+		.tribe-tickets-commerce-gateway-mail-in__important-note {
+			background: #fff3cd;
+			border: 1px solid #ffeaa7;
+			padding: 15px;
+			border-radius: 4px;
+			margin-top: 20px;
+		}
+
+		.tribe-tickets-commerce-gateway-mail-in__important-note h4 {
+			color: #856404;
+			margin-top: 0;
+		}
+
+		.tribe-tickets-commerce-gateway-mail-in__important-note ul {
+			margin: 10px 0 0 0;
+			padding-left: 20px;
+		}
+
+		.tribe-tickets-commerce-gateway-mail-in__important-note li {
+			margin-bottom: 5px;
+			color: #856404;
+		}
+	</style>
+</div>
\ No newline at end of file
diff --git a/templates/emails/order-cancelled.php b/templates/emails/order-cancelled.php
new file mode 100644
index 0000000..208bc15
--- /dev/null
+++ b/templates/emails/order-cancelled.php
@@ -0,0 +1,141 @@
+<?php
+/**
+ * Order cancelled email template
+ *
+ * @since 1.0.0
+ * @var \TEC\Tickets\Commerce\Order $order Order object
+ */
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+?><!DOCTYPE html>
+<html>
+<head>
+	<meta charset="utf-8">
+	<meta name="viewport" content="width=device-width, initial-scale=1.0">
+	<title><?php printf( __( 'Order Cancelled: #%s', 'event-tickets-mail-in' ), $order->get_order_number() ); ?></title>
+	<style>
+		body {
+			font-family: Arial, sans-serif;
+			line-height: 1.6;
+			color: #333;
+			max-width: 600px;
+			margin: 0 auto;
+			padding: 20px;
+		}
+		.header {
+			background: #f8d7da;
+			padding: 20px;
+			text-align: center;
+			border-radius: 8px 8px 0 0;
+			border-bottom: 3px solid #dc3545;
+		}
+		.content {
+			background: #fff;
+			padding: 30px;
+			border: 1px solid #ddd;
+		}
+		.order-summary {
+			background: #f8f9fa;
+			padding: 20px;
+			border-radius: 4px;
+			margin: 20px 0;
+		}
+		.cancellation-notice {
+			background: #f8d7da;
+			padding: 20px;
+			border-radius: 4px;
+			border-left: 4px solid #dc3545;
+			margin: 20px 0;
+		}
+		.contact-info {
+			background: #e7f3ff;
+			padding: 15px;
+			border-radius: 4px;
+			border-left: 4px solid #0073aa;
+			margin: 20px 0;
+		}
+		.footer {
+			background: #f8f9fa;
+			padding: 20px;
+			text-align: center;
+			border-radius: 0 0 8px 8px;
+			border-top: 1px solid #ddd;
+			font-size: 14px;
+			color: #666;
+		}
+		h1, h2, h3 {
+			color: #dc3545;
+		}
+		.order-number {
+			font-size: 24px;
+			font-weight: bold;
+			color: #dc3545;
+		}
+		.cancel-icon {
+			font-size: 48px;
+			color: #dc3545;
+			margin-bottom: 10px;
+		}
+	</style>
+</head>
+<body>
+	<div class="email-container">
+		<div class="header">
+			<div class="cancel-icon">✗</div>
+			<h1><?php esc_html_e( 'Order Cancelled', 'event-tickets-mail-in' ); ?></h1>
+			<p><?php printf( __( 'Order #%s', 'event-tickets-mail-in' ), '<span class="order-number">' . esc_html( $order->get_order_number() ) . '</span>' ); ?></p>
+		</div>
+
+		<div class="content">
+			<h2><?php esc_html_e( 'Your order has been cancelled', 'event-tickets-mail-in' ); ?></h2>
+			
+			<p><?php printf( 
+				__( 'Hello %s,', 'event-tickets-mail-in' ), 
+				esc_html( $order->get_purchaser_name() ) 
+			); ?></p>
+
+			<div class="cancellation-notice">
+				<h3><?php esc_html_e( 'Order Cancellation Notice', 'event-tickets-mail-in' ); ?></h3>
+				<p><?php esc_html_e( 'We regret to inform you that your order has been cancelled. This may have occurred for one of the following reasons:', 'event-tickets-mail-in' ); ?></p>
+				<ul>
+					<li><?php esc_html_e( 'Payment was not received within the specified timeframe', 'event-tickets-mail-in' ); ?></li>
+					<li><?php esc_html_e( 'Check payment was returned/bounced', 'event-tickets-mail-in' ); ?></li>
+					<li><?php esc_html_e( 'Manual cancellation by administrator', 'event-tickets-mail-in' ); ?></li>
+					<li><?php esc_html_e( 'Event was cancelled or postponed', 'event-tickets-mail-in' ); ?></li>
+				</ul>
+			</div>
+
+			<div class="order-summary">
+				<h3><?php esc_html_e( 'Cancelled Order Details', 'event-tickets-mail-in' ); ?></h3>
+				<p><strong><?php esc_html_e( 'Order Number:', 'event-tickets-mail-in' ); ?></strong> <?php echo esc_html( $order->get_order_number() ); ?></p>
+				<p><strong><?php esc_html_e( 'Order Total:', 'event-tickets-mail-in' ); ?></strong> <?php echo esc_html( $order->get_total_value()->get_formatted() ); ?></p>
+				<p><strong><?php esc_html_e( 'Cancellation Date:', 'event-tickets-mail-in' ); ?></strong> <?php echo esc_html( date_i18n( get_option( 'date_format' ) . ' ' . get_option( 'time_format' ) ) ); ?></p>
+				<p><strong><?php esc_html_e( 'Status:', 'event-tickets-mail-in' ); ?></strong> <span style="color: #dc3545; font-weight: bold;"><?php esc_html_e( 'Cancelled', 'event-tickets-mail-in' ); ?></span></p>
+			</div>
+
+			<h3><?php esc_html_e( 'What this means:', 'event-tickets-mail-in' ); ?></h3>
+			<ul>
+				<li><?php esc_html_e( 'Your ticket reservation has been released', 'event-tickets-mail-in' ); ?></li>
+				<li><?php esc_html_e( 'No payment is required for this cancelled order', 'event-tickets-mail-in' ); ?></li>
+				<li><?php esc_html_e( 'If you already mailed a check, please contact us for a refund', 'event-tickets-mail-in' ); ?></li>
+				<li><?php esc_html_e( 'You can place a new order if tickets are still available', 'event-tickets-mail-in' ); ?></li>
+			</ul>
+
+			<div class="contact-info">
+				<h3><?php esc_html_e( 'Questions or Concerns?', 'event-tickets-mail-in' ); ?></h3>
+				<p><?php esc_html_e( 'If you believe this cancellation was made in error, or if you have any questions about this cancellation, please contact us immediately.', 'event-tickets-mail-in' ); ?></p>
+				<p><?php esc_html_e( 'We apologize for any inconvenience this may cause.', 'event-tickets-mail-in' ); ?></p>
+			</div>
+
+			<p><?php esc_html_e( 'Thank you for your understanding.', 'event-tickets-mail-in' ); ?></p>
+		</div>
+
+		<div class="footer">
+			<p><?php echo esc_html( get_option( 'blogname' ) ); ?></p>
+			<p><?php echo esc_html( get_option( 'admin_email' ) ); ?></p>
+		</div>
+	</div>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/emails/payment-confirmation.php b/templates/emails/payment-confirmation.php
new file mode 100644
index 0000000..5e06dba
--- /dev/null
+++ b/templates/emails/payment-confirmation.php
@@ -0,0 +1,122 @@
+<?php
+/**
+ * Payment confirmation email template
+ *
+ * @since 1.0.0
+ * @var \TEC\Tickets\Commerce\Order $order Order object
+ */
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+?><!DOCTYPE html>
+<html>
+<head>
+	<meta charset="utf-8">
+	<meta name="viewport" content="width=device-width, initial-scale=1.0">
+	<title><?php printf( __( 'Payment Confirmed for Order #%s', 'event-tickets-mail-in' ), $order->get_order_number() ); ?></title>
+	<style>
+		body {
+			font-family: Arial, sans-serif;
+			line-height: 1.6;
+			color: #333;
+			max-width: 600px;
+			margin: 0 auto;
+			padding: 20px;
+		}
+		.header {
+			background: #d4edda;
+			padding: 20px;
+			text-align: center;
+			border-radius: 8px 8px 0 0;
+			border-bottom: 3px solid #28a745;
+		}
+		.content {
+			background: #fff;
+			padding: 30px;
+			border: 1px solid #ddd;
+		}
+		.order-summary {
+			background: #f8f9fa;
+			padding: 20px;
+			border-radius: 4px;
+			margin: 20px 0;
+		}
+		.success-message {
+			background: #d4edda;
+			padding: 20px;
+			border-radius: 4px;
+			border-left: 4px solid #28a745;
+			margin: 20px 0;
+		}
+		.footer {
+			background: #f8f9fa;
+			padding: 20px;
+			text-align: center;
+			border-radius: 0 0 8px 8px;
+			border-top: 1px solid #ddd;
+			font-size: 14px;
+			color: #666;
+		}
+		h1, h2, h3 {
+			color: #28a745;
+		}
+		.order-number {
+			font-size: 24px;
+			font-weight: bold;
+			color: #28a745;
+		}
+		.success-icon {
+			font-size: 48px;
+			color: #28a745;
+			margin-bottom: 10px;
+		}
+	</style>
+</head>
+<body>
+	<div class="email-container">
+		<div class="header">
+			<div class="success-icon">✓</div>
+			<h1><?php esc_html_e( 'Payment Confirmed!', 'event-tickets-mail-in' ); ?></h1>
+			<p><?php printf( __( 'Order #%s', 'event-tickets-mail-in' ), '<span class="order-number">' . esc_html( $order->get_order_number() ) . '</span>' ); ?></p>
+		</div>
+
+		<div class="content">
+			<h2><?php esc_html_e( 'Your payment has been received!', 'event-tickets-mail-in' ); ?></h2>
+			
+			<p><?php printf( 
+				__( 'Hello %s,', 'event-tickets-mail-in' ), 
+				esc_html( $order->get_purchaser_name() ) 
+			); ?></p>
+
+			<div class="success-message">
+				<h3><?php esc_html_e( 'Great news!', 'event-tickets-mail-in' ); ?></h3>
+				<p><?php esc_html_e( 'We have received and processed your check payment. Your order is now complete and your tickets are confirmed!', 'event-tickets-mail-in' ); ?></p>
+			</div>
+
+			<div class="order-summary">
+				<h3><?php esc_html_e( 'Order Summary', 'event-tickets-mail-in' ); ?></h3>
+				<p><strong><?php esc_html_e( 'Order Number:', 'event-tickets-mail-in' ); ?></strong> <?php echo esc_html( $order->get_order_number() ); ?></p>
+				<p><strong><?php esc_html_e( 'Payment Method:', 'event-tickets-mail-in' ); ?></strong> <?php esc_html_e( 'Check Payment', 'event-tickets-mail-in' ); ?></p>
+				<p><strong><?php esc_html_e( 'Total Amount:', 'event-tickets-mail-in' ); ?></strong> <?php echo esc_html( $order->get_total_value()->get_formatted() ); ?></p>
+				<p><strong><?php esc_html_e( 'Payment Status:', 'event-tickets-mail-in' ); ?></strong> <span style="color: #28a745; font-weight: bold;"><?php esc_html_e( 'Completed', 'event-tickets-mail-in' ); ?></span></p>
+			</div>
+
+			<h3><?php esc_html_e( 'What happens next?', 'event-tickets-mail-in' ); ?></h3>
+			<ul>
+				<li><?php esc_html_e( 'Your tickets are now confirmed and active.', 'event-tickets-mail-in' ); ?></li>
+				<li><?php esc_html_e( 'You should receive your tickets in a separate email shortly.', 'event-tickets-mail-in' ); ?></li>
+				<li><?php esc_html_e( 'Please keep this confirmation for your records.', 'event-tickets-mail-in' ); ?></li>
+				<li><?php esc_html_e( 'If you have any questions, please contact us.', 'event-tickets-mail-in' ); ?></li>
+			</ul>
+
+			<p><?php esc_html_e( 'Thank you for your payment and we look forward to seeing you at the event!', 'event-tickets-mail-in' ); ?></p>
+		</div>
+
+		<div class="footer">
+			<p><?php echo esc_html( get_option( 'blogname' ) ); ?></p>
+			<p><?php echo esc_html( get_option( 'admin_email' ) ); ?></p>
+		</div>
+	</div>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/emails/payment-instructions.php b/templates/emails/payment-instructions.php
new file mode 100644
index 0000000..76484dc
--- /dev/null
+++ b/templates/emails/payment-instructions.php
@@ -0,0 +1,170 @@
+<?php
+/**
+ * Payment instructions email template
+ *
+ * @since 1.0.0
+ * @var \TEC\Tickets\Commerce\Order $order Order object
+ * @var array $details Mail-in payment details
+ */
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+?><!DOCTYPE html>
+<html>
+<head>
+	<meta charset="utf-8">
+	<meta name="viewport" content="width=device-width, initial-scale=1.0">
+	<title><?php printf( __( 'Payment Instructions for Order #%s', 'event-tickets-mail-in' ), $order->get_order_number() ); ?></title>
+	<style>
+		body {
+			font-family: Arial, sans-serif;
+			line-height: 1.6;
+			color: #333;
+			max-width: 600px;
+			margin: 0 auto;
+			padding: 20px;
+		}
+		.header {
+			background: #f8f9fa;
+			padding: 20px;
+			text-align: center;
+			border-radius: 8px 8px 0 0;
+			border-bottom: 3px solid #0073aa;
+		}
+		.content {
+			background: #fff;
+			padding: 30px;
+			border: 1px solid #ddd;
+		}
+		.order-summary {
+			background: #f8f9fa;
+			padding: 20px;
+			border-radius: 4px;
+			margin: 20px 0;
+		}
+		.payment-details {
+			background: #e7f3ff;
+			padding: 20px;
+			border-radius: 4px;
+			border-left: 4px solid #0073aa;
+			margin: 20px 0;
+		}
+		.important-notes {
+			background: #fff3cd;
+			padding: 15px;
+			border-radius: 4px;
+			border-left: 4px solid #ffc107;
+			margin: 20px 0;
+		}
+		.footer {
+			background: #f8f9fa;
+			padding: 20px;
+			text-align: center;
+			border-radius: 0 0 8px 8px;
+			border-top: 1px solid #ddd;
+			font-size: 14px;
+			color: #666;
+		}
+		.mailing-address {
+			background: #f5f5f5;
+			padding: 15px;
+			border-radius: 4px;
+			margin: 10px 0;
+			font-weight: bold;
+		}
+		h1, h2, h3 {
+			color: #0073aa;
+		}
+		.order-number {
+			font-size: 24px;
+			font-weight: bold;
+			color: #0073aa;
+		}
+		ul {
+			padding-left: 20px;
+		}
+		li {
+			margin-bottom: 5px;
+		}
+	</style>
+</head>
+<body>
+	<div class="email-container">
+		<div class="header">
+			<h1><?php esc_html_e( 'Payment Instructions', 'event-tickets-mail-in' ); ?></h1>
+			<p><?php printf( __( 'Order #%s', 'event-tickets-mail-in' ), '<span class="order-number">' . esc_html( $order->get_order_number() ) . '</span>' ); ?></p>
+		</div>
+
+		<div class="content">
+			<h2><?php esc_html_e( 'Thank you for your order!', 'event-tickets-mail-in' ); ?></h2>
+			
+			<p><?php printf( 
+				__( 'Hello %s,', 'event-tickets-mail-in' ), 
+				esc_html( $order->get_purchaser_name() ) 
+			); ?></p>
+
+			<p><?php esc_html_e( 'Your order has been received and your tickets have been reserved. To complete your purchase, please mail your check payment using the details below.', 'event-tickets-mail-in' ); ?></p>
+
+			<div class="order-summary">
+				<h3><?php esc_html_e( 'Order Summary', 'event-tickets-mail-in' ); ?></h3>
+				<p><strong><?php esc_html_e( 'Order Number:', 'event-tickets-mail-in' ); ?></strong> <?php echo esc_html( $order->get_order_number() ); ?></p>
+				<p><strong><?php esc_html_e( 'Order Date:', 'event-tickets-mail-in' ); ?></strong> <?php echo esc_html( date_i18n( get_option( 'date_format' ), strtotime( $details['created_date'] ) ) ); ?></p>
+				<p><strong><?php esc_html_e( 'Total Amount:', 'event-tickets-mail-in' ); ?></strong> <?php echo esc_html( $order->get_total_value()->get_formatted() ); ?></p>
+			</div>
+
+			<div class="payment-details">
+				<h3><?php esc_html_e( 'Payment Instructions', 'event-tickets-mail-in' ); ?></h3>
+				
+				<?php if ( $details['instructions'] ) : ?>
+					<p><?php echo wp_kses_post( nl2br( $details['instructions'] ) ); ?></p>
+				<?php endif; ?>
+
+				<?php if ( $details['payable_to'] ) : ?>
+					<p><strong><?php esc_html_e( 'Make Check Payable To:', 'event-tickets-mail-in' ); ?></strong></p>
+					<p style="font-size: 18px; font-weight: bold; color: #0073aa;"><?php echo esc_html( $details['payable_to'] ); ?></p>
+				<?php endif; ?>
+
+				<?php if ( $details['mailing_address'] ) : ?>
+					<p><strong><?php esc_html_e( 'Mail Your Check To:', 'event-tickets-mail-in' ); ?></strong></p>
+					<div class="mailing-address">
+						<?php echo wp_kses_post( nl2br( $details['mailing_address'] ) ); ?>
+					</div>
+				<?php endif; ?>
+
+				<p><strong><?php esc_html_e( 'Check Amount:', 'event-tickets-mail-in' ); ?></strong> <?php echo esc_html( $order->get_total_value()->get_formatted() ); ?></p>
+			</div>
+
+			<div class="important-notes">
+				<h3><?php esc_html_e( 'Important Notes', 'event-tickets-mail-in' ); ?></h3>
+				<ul>
+					<li><?php printf( __( 'Please write your order number (%s) in the check memo line.', 'event-tickets-mail-in' ), esc_html( $order->get_order_number() ) ); ?></li>
+					<li><?php 
+						$reservation_days = absint( get_option( 'et_mail_in_reservation_days', 7 ) );
+						printf( 
+							_n( 
+								'Your tickets will be reserved for %d day while we wait for your payment.', 
+								'Your tickets will be reserved for %d days while we wait for your payment.', 
+								$reservation_days, 
+								'event-tickets-mail-in' 
+							), 
+							$reservation_days 
+						); 
+					?></li>
+					<li><?php esc_html_e( 'You will receive a confirmation email once your payment is received and processed.', 'event-tickets-mail-in' ); ?></li>
+					<li><?php esc_html_e( 'Please keep this email for your records.', 'event-tickets-mail-in' ); ?></li>
+				</ul>
+			</div>
+
+			<p><?php esc_html_e( 'If you have any questions about your order or payment, please contact us.', 'event-tickets-mail-in' ); ?></p>
+
+			<p><?php esc_html_e( 'Thank you for your business!', 'event-tickets-mail-in' ); ?></p>
+		</div>
+
+		<div class="footer">
+			<p><?php echo esc_html( get_option( 'blogname' ) ); ?></p>
+			<p><?php echo esc_html( get_option( 'admin_email' ) ); ?></p>
+		</div>
+	</div>
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/v2/commerce/gateway/mail-in/container.php b/templates/v2/commerce/gateway/mail-in/container.php
new file mode 100644
index 0000000..ab790ac
--- /dev/null
+++ b/templates/v2/commerce/gateway/mail-in/container.php
@@ -0,0 +1,124 @@
+<?php
+/**
+ * Mail-In Payment checkout container template
+ *
+ * @since 1.0.0
+ * @var array $args Template arguments
+ * @var \ET_Mail_In_Payment\Gateway $gateway Gateway instance
+ * @var string $instructions Payment instructions
+ * @var string $mailing_address Mailing address
+ * @var string $payable_to Check payable to
+ */
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+// Variables are extracted from $context in the Gateway class
+// If not available directly, try to get from $args (fallback)
+if ( ! isset( $gateway ) ) {
+	$gateway = $args['gateway'] ?? null;
+}
+if ( ! isset( $instructions ) ) {
+	$instructions = $args['instructions'] ?? '';
+}
+if ( ! isset( $mailing_address ) ) {
+	$mailing_address = $args['mailing_address'] ?? '';
+}
+if ( ! isset( $payable_to ) ) {
+	$payable_to = $args['payable_to'] ?? '';
+}
+
+// Get class name for static method calls
+$gateway_class = $gateway ? get_class( $gateway ) : '';
+?>
+
+<div class="tribe-tickets-commerce-gateway-mail-in">
+	<!-- Toggle Button -->
+	<div class="tribe-tickets-commerce-gateway-mail-in__toggle">
+		<button type="button" id="mail-in-toggle-button" class="tribe-tickets-commerce-gateway-mail-in__toggle-button">
+			<span class="toggle-icon">▶</span>
+			<?php esc_html_e( 'Click here to pay by mail (check)', 'event-tickets-mail-in' ); ?>
+		</button>
+	</div>
+
+	<!-- Hidden Content (Payment Instructions and Form) -->
+	<div class="tribe-tickets-commerce-gateway-mail-in__content" id="mail-in-content" style="display: none;">
+		<div class="tribe-tickets-commerce-gateway-mail-in__header">
+			<h4><?php echo esc_html( $gateway_class ? $gateway_class::get_label() : __( 'Mail-In Payment', 'event-tickets-mail-in' ) ); ?></h4>
+			<p class="tribe-tickets-commerce-gateway-mail-in__description">
+				<?php echo esc_html( $gateway_class ? $gateway_class::get_description() : __( 'Pay by mailing a check', 'event-tickets-mail-in' ) ); ?>
+			</p>
+		</div>
+
+	<div class="tribe-tickets-commerce-gateway-mail-in__instructions">
+		<?php if ( $instructions ) : ?>
+			<div class="tribe-tickets-commerce-gateway-mail-in__instructions-text">
+				<strong><?php esc_html_e( 'Payment Instructions:', 'event-tickets-mail-in' ); ?></strong>
+				<p><?php echo wp_kses_post( nl2br( $instructions ) ); ?></p>
+			</div>
+		<?php endif; ?>
+
+		<div class="tribe-tickets-commerce-gateway-mail-in__details">
+			<?php if ( $payable_to ) : ?>
+				<div class="tribe-tickets-commerce-gateway-mail-in__payable-to">
+					<strong><?php esc_html_e( 'Make Check Payable To:', 'event-tickets-mail-in' ); ?></strong>
+					<p class="tribe-tickets-commerce-gateway-mail-in__payable-to-name">
+						<?php echo esc_html( $payable_to ); ?>
+					</p>
+				</div>
+			<?php endif; ?>
+
+			<?php if ( $mailing_address ) : ?>
+				<div class="tribe-tickets-commerce-gateway-mail-in__address">
+					<strong><?php esc_html_e( 'Mail Your Check To:', 'event-tickets-mail-in' ); ?></strong>
+					<div class="tribe-tickets-commerce-gateway-mail-in__address-block">
+						<?php echo wp_kses_post( nl2br( $mailing_address ) ); ?>
+					</div>
+				</div>
+			<?php endif; ?>
+		</div>
+
+		<div class="tribe-tickets-commerce-gateway-mail-in__important-note">
+			<strong><?php esc_html_e( 'Important Notes:', 'event-tickets-mail-in' ); ?></strong>
+			<ul>
+				<li><?php esc_html_e( 'Please include your order number in the check memo line.', 'event-tickets-mail-in' ); ?></li>
+				<li><?php esc_html_e( 'Your tickets will be reserved while we wait for your payment to arrive.', 'event-tickets-mail-in' ); ?></li>
+				<li><?php esc_html_e( 'You will receive a confirmation email once your payment is processed.', 'event-tickets-mail-in' ); ?></li>
+			</ul>
+		</div>
+	</div>
+
+	<!-- Gateway Selection Form -->
+	<form class="tribe-tickets__commerce-checkout-form tribe-tickets__commerce-checkout-form--mail-in" method="post">
+		<?php wp_nonce_field( 'tec_tickets_commerce_checkout', 'tec_tickets_commerce_checkout_nonce' ); ?>
+		<input type="hidden" name="tec_tc_gateway" value="mail-in" />
+		
+		<!-- Purchaser Information -->
+		<div class="tribe-tickets__commerce-checkout-purchaser-info">
+			<h4><?php esc_html_e( 'Contact Information', 'event-tickets-mail-in' ); ?></h4>
+			
+			<div class="tribe-tickets__commerce-checkout-form-field">
+				<label for="purchaser_name"><?php esc_html_e( 'Full Name', 'event-tickets-mail-in' ); ?> <span class="required">*</span></label>
+				<input type="text" id="purchaser_name" name="purchaser_name" required class="tribe-common-form-control-text__input" />
+			</div>
+			
+			<div class="tribe-tickets__commerce-checkout-form-field">
+				<label for="purchaser_email"><?php esc_html_e( 'Email Address', 'event-tickets-mail-in' ); ?> <span class="required">*</span></label>
+				<input type="email" id="purchaser_email" name="purchaser_email" required class="tribe-common-form-control-text__input" />
+			</div>
+		</div>
+		
+		<div class="tribe-tickets__commerce-checkout-form-submit">
+			<button 
+				id="tec-tc-gateway-mail-in-checkout-button" 
+				type="submit"
+				class="tribe-common-c-btn tribe-tickets__commerce-checkout-form-submit-button"
+				data-gateway="mail-in"
+			>
+				<?php esc_html_e( 'Place Order (Pay by Check)', 'event-tickets-mail-in' ); ?>
+			</button>
+		</div>
+	</form>
+	</div> <!-- End .tribe-tickets-commerce-gateway-mail-in__content -->
+</div>
\ No newline at end of file