This gift code only works on Amazon.com in the United States. You might need to have a second payment option added (Credit cards or Bank accounts) and a verified USA address to redeem it on Amazon.com. Amazon's anti-fraud process can lock cards and accounts if it suspects that their terms are broken. The common reason is using a VPN. The other reasons might be reselling or dropshipping, adding a gift card code on a new account with no other payment options added, adding large number of high value gift card codes in a short period of time.

For more information visit amazon.com/gc-legal and amazon.com/gc-restrictions.