If the guarantor can't repay the loan, the bank has the right to auction the guarantor's assets to pay off the debt (if you only have one suite, you can't pay off the debt). If your friend takes his house as collateral and fails to repay the principal and interest within the time limit, the bank will auction his property first. If the lender intends or is unable to repay the rest, you will be jointly and severally as a guarantor, and the bank will use various legal means to collect debts. So if you want to be a guarantor, you need to have enough trust in your friend and have the right to know the purpose of his loan. So you must be careful.