To freeze an Amex Gold card, log in to your online account or the American Express mobile app and navigate to “Freeze Your Card." You can also call American Express customer service at 1 (800) 528-4800 and ask them to freeze your card, though it is much easier to lock and unlock a card on the app.
Freezing your Amex Gold card will temporarily prevent most purchases from being made with your card number, which can be convenient if you lost your card or if you're trying to control your spending. For lost cards, it's also important to note that you'll never be held responsible for unauthorized purchases thanks to a $0 fraud liability guarantee.
How to Freeze an Amex Gold card Online
Log in to your American Express online account or mobile app.
Pick the Amex Gold card and select Account Services.
Click Card Management.
Click the “Freeze Card” button.
Locking your Amex Gold card will stop new purchases. But it will continue to allow recurring transactions, digital wallet purchases, and some online purchases where your card is on file. To start using your card at full capacity again, just navigate back to the Freeze Your Card page and unfreeze the Amex Gold card.