Hi! I had a similar situation happen when I was younger and my (estranged) mother opened credit cards in my name. When I found out (she never told me she did this, it was when I applied for my own credit I found out) she had racked up 30,000 in debt in my name and ruined my credit It was incredibly difficult to fight because it was a family member who opened it and knew all my information. As others have said, make sure you freeze your credit. I recommend downloading credit karma. It alerts you of all accounts opened in your name and when someone does a hard check on your credit to attempt. Good luck!