<prompt> Human: When I was twenty two I cosigned on a Sallie Mae loan so my sister could go to school. Fast forward ten years to today, and my sister has stopped paying her loan payment to Navient. I really have no idea what to do. I asked her for the login information, and she told me no, that I was being a jerk just for asking. But shes basically ruining my credit, and Ive been trying so hard to get it worked out. Any suggestions? Anyone been in this situation? Thank you. Assistant: Call Navient and ask them for information on the loan.Human: I figured that. I just didnt know if anyone had any insight to the situation. But thanks, I will do that today.  <response>: If you cosigned, its your loan now if she stopped paying. Unfortunately, its more of a relationship problem than a financial one. The financial side is clear. 