Check the expiration date of the coupon code to ensure it is still valid. Verify the terms and conditions of the coupon to make sure it applies to the items in the cart. Ensure the coupon code is entered correctly, without any typos or extra spaces. Confirm the coupon code is applicable to the specific products being purchased, as some codes may have restrictions. Try using a different browser or device to see if the issue persists. Clear the browser's cache and cookies to eliminate any potential conflicts. Contact customer support for assistance if the coupon code still doesn't work. Look for alternative coupon codes that may offer similar discounts. Check for any ongoing promotions on the website that might provide discounts without needing a coupon code. Ensure the minimum purchase requirement is met if the coupon has one.
