Paylock lets you control which discount codes should not be used with Cash on Delivery orders. If a restricted discount is applied and the customer selects Cash on Delivery, Paylock blocks checkout and shows a clear message explaining that the discount is not available for COD orders. This helps prevent misuse of influencer codes, promotional discounts etc on COD payments. Paylock runs directly in Shopify Checkout using Checkout Extensions, so it works without modifying your theme code

• Block Cash on Delivery for selected discount codes
• Apply rules instantly without editing your discounts
• Customise the message shown at checkout
• Enable or disable rules anytime
• Works directly inside Shopify Checkout