Authorized users are like guests on the account because they can make charges onto the account and have their own card but are not liable for any debt. Authorized users have whatever amount of charging priveliges the account holder grants them, although they are not required to pay any of the balance. To find out if you're an authorized user on a credit card, simply call the customer service number on the back of the card and ask them. You can also check your credit report. On the section that lists the accounts, look for a letter before the account information. If you see an "A," you're an authorized user. Add authorized users to your credit card account with caution: they're able to use your account just as you do, although they'll have no liability. Only add someone that you can trust. A very common tactic is to put a lower credit limit on the authorized user's spending. Many credit card companies allow this, especially for people that want to allow their children to be authorized users on their account to teach them responsibility.