An American Express (AMEX) gift card is a prepaid card that can be used at any merchant that accepts American Express cards as payment. The card is loaded with a predetermined amount of money, and the recipient can use the card until the balance runs out. AMEX gift cards are popular as a gifting option for various occasions, including birthdays, weddings, and holidays. — One of the significant benefits of an AMEX gift card is its versatility, as it can be used to make purchases online, in-store, or over the phone. Also, AMEX gift cards are widely accepted worldwide, making them a convenient option for both domestic and international purchases.