1. Contact the lending institution: You need to contact the lending institution and tell it that you have not signed the loan agreement. You can provide evidence such as loan agreement, bank statement and chat record. To prove that your boyfriend is not authorized to use the identity information loan.
2. Call the police: If the boyfriend refuses to admit his mistake or is unable to repay the loan, he can report the case to the local police. The police will investigate and take appropriate actions to protect their own interests.