<prompt> Human: Im looking to buy a house soon so I recently signed up for, and checked out my credit score on credit karma. Not too bad at all.. I know I had very littlelimited credit but what I didnt know is that someone opened a credit card under my name 3y 6m ago. However, they have never been late on a payment, have a 4100 credit limit, and only utilize about 25 of their credit. Im pretty sure its the reason my score is so high.What should I do? Tl;dr: someone stole my identity and gave me good credit. Assistant: Could it be a parent or other family member who added you as an authorized user on their card for this exact reason? Human: Yes... Mom put me on as an authorized user when she heard I was serious about a house.  <response>: Dont you just love those tiny heart attacks that turn out fine after all? Good luck with the house! 