If you want to use a Visa/AMEX/MasterCard gift card on the site, you will need to register it with Visa/AMEX/MasterCard. This is necessary because our site will check for the AVS address and zip code. Please also be sure to retain the gift card in the case of a return. We credit the card used for payment, so if you throw away the gift card, you will have problems accessing the refunded amount from your return.