Chip Lupo, Credit Card Writer
@CLoop
To activate an American Express Platinum card, call the number on the activation sticker that's attached to the card or go to the American Express activation website, which will also be noted on the sticker. Another way to activate an American Express Platinum card will be ready to make purchases in just a few minutes no matter which method you use to activate it. American Express does not have a certain time limit within which you need to activate your card, but it's best to do it as soon as possible.
How to Activate an American Express Platinum card
- By phone: Call 1 (800) 528-4800 or the number on the sticker attached to the front of the card. Verify your personal information (e.g. Social Security number, card number, or phone number associated with your application) to activate your American Express Platinum card.
- On the website: Log in to your American Express account (or create an account if you don't have one) and find the activation page. Enter any required security information, including your card number and 4-digit card ID. Activate your American Express Platinum card card as instructed.
- On mobile: Log in to the American Express mobile app using the same credentials that you'd use to log in online. Tap the card activation button, then enter any security information that's requested on the following page.
Your new American Express Platinum card will be available for purchases immediately after activation. If you have any trouble activating your card, American Express customer service can always help you out. You can give them a call at 1 (800) 528-4800.

The Platinum Card® from American Express
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