Sign in to your Amazon account
Go to Your Account
Select Your Payments
Click Add a payment method
Choose Add a credit or debit card
Enter the Visa gift card number
Enter the expiration date
Enter the billing name and address linked to the card
Save the card
Use the Visa gift card at checkout
If the card is declined, check the balance and billing address
If needed, register the gift card with the issuer before adding it to Amazon