Coupon codes are not case sensitive, but please be sure you are entering the code exactly the way it was sent to you.
Watch out for characters that can look similar such as the letter "I" and the number "1", or the letter "O" and the number "0". It is best to copy and paste the coupon code when sent by email.
Your code may have been a one-time use coupon and you have already used it.
Be sure you have added the correct product or quantity to your cart that the code corresponds to. Many codes are for a specific product; be sure that you have added everything to your cart first before applying any codes.
Be sure you clicked the "Save Code" button after entering your code.
Be sure you are entering the code in the "coupon discount" field. The coupon discount field is found when you click on your cart at the top right corner of the web site. Inside the cart, it is the last tab on the right bottom of the cart.
Coupons or specials cannot be combined with other offers. You can only use one coupon code per order.
Some codes and special offers come with stipulations to ensure their proper usage. Please make sure that you are logged in to your account and all items noted for a given special are included in your shopping cart prior to the application of the code.
You can also add a discount code during the checkout process.