Why am I unable to apply the collected coupon when making a purchase?

Common issues with promo codes:

• Items must meet all coupon criteria as stated in the coupon offer which includes but are not limited to, minimum and/or max purchase requirements, and collection/item restrictions. Please read the email to get more information about the eligible items for which you can apply the coupon.
• Some code can be used once and you’ve already used the code before. 
• You haven't entered the code exactly as it was advertised - Try copying and pasting it and don't leave any extra characters or spaces.
• The coupon has expired.