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When you hold an American Express Platinum card, you have the option to add other people to your account as authorized users. This means they receive their own card linked to your account and can make purchases using your account's credit line. Understanding how this works—and what it does and doesn't do—is important before you add someone.
An authorized user is someone you permit to use a card in their own name, but the account and all charges belong to you, the primary cardholder. You set the rules, you receive all the statements, and you're responsible for paying the entire bill.
The authorized user gets their own physical card with their name on it. They can use it for purchases at merchants, online, and anywhere American Express is accepted. From a practical standpoint, the authorized user experience is nearly identical to holding a primary card—but legally and financially, the account flows back to you.
Key point: You remain fully liable for all charges made by any authorized user on your account. American Express will look to you for payment, regardless of who swiped the card.
People typically add authorized users in these situations:
| Capability | Authorized User? | Notes |
|---|---|---|
| Make purchases | ✓ Yes | Full purchasing power on the account |
| Access their own statement | Varies | Depends on how Amex structures account access |
| Change account settings | ✗ No | Only you can modify terms, add/remove users, or change billing |
| Call customer service | Limited | They may have restricted access; you have primary authority |
| Earn rewards | ✓ Yes | Purchases count toward your account's earning rate |
| Build their own credit | Conditional | Credit reporting depends on how Amex reports the account |
One of the most misunderstood aspects of authorized user cards is how they appear on credit reports. American Express has discretion in how it reports authorized user activity. Some card issuers report authorized user accounts to credit bureaus under the authorized user's name; others do not.
If Amex does report the account:
If Amex doesn't report the account to the authorized user's credit file, adding them as an authorized user won't directly affect their credit.
You should verify with American Express directly how authorized user accounts are reported, since policies can change and specifics matter for your situation.
You are liable for all charges. If an authorized user makes purchases you didn't authorize or runs up debt, you still owe American Express. There's no automatic fraud protection for charges made by someone you've explicitly authorized to use the card.
Relationship changes can complicate things. If you separate from a spouse or have a falling out with a family member, they keep using the card until you call and remove them. There's a window during which they can still make charges.
Account limits apply to everyone. Any spending limits or restrictions you set (if available) apply across the entire account—not individually to each authorized user.
You can typically manage authorized users through your American Express online account, by calling customer service, or in some cases through the Amex mobile app. Removal is usually immediate, though you may want to ask about retrieving the physical card or confirming that charges stop right away.
Adding an authorized user makes sense if you trust someone completely with access to your account, understand the liability you're taking on, and have a clear reason for sharing the card. It's less appropriate if you're uncomfortable with their spending habits, unsure of their financial responsibility, or looking for a way to help someone build credit without understanding the account structure.
The relationship and financial dynamic between you and the person matters most here. There's no one-size-fits-all answer—it depends entirely on your trust level, your household structure, and what you're trying to accomplish.
