The bank is not responsible. What you have to do now is to make your friends repay the money normally every month. If your friend doesn't pay back the money, the bank will recover the debt from you. If it is unsecured and you don't pay back the money, the bank will sue you and recover the debt from you at some time. If not, it will bear the corresponding legal responsibility. If it is a secured loan, if your friend doesn't pay back the money, the bank will sue the court to seal up your collateral at a certain time and auction it. Also, whether it is mortgaged or unsecured, once your friend fails to pay back the money in time, your credit will be overdue, which will affect your own bank reputation and loan in the future. I hope my answer is helpful to you.