Share the repayment responsibility with the borrower. For example, if the lender fails to repay the loan, the loan co-signer will bear the repayment responsibility. Generally speaking, after marriage, the husband and wife borrow money to buy a car or a house, and both parties sign it together. In addition to the main lender, another person is the co-signatory of the loan. The loan co-signer is different from the loan guarantor. When the borrower fails to repay the loan, the bank will collect the debt from both signatories at the same time.

The loan guarantor shall bear the repayment guarantee responsibility for the debtor when the debtor fails to repay the loan within the time limit. According to the different types of guarantees, the commitments are different, as follows:

1. If it is a general guarantee, the guarantor may refuse to accept and assume the guarantee responsibility before the main contract dispute is tried or arbitrated and the debtor's property is enforced according to law.

2. If it is a joint guarantee, the creditor may require the debtor to perform the debt, or the guarantor may be required to assume the guarantee liability within the scope of its guarantee. In other words, after the main contract has not been tried or arbitrated, the guarantor needs to bear the guarantee responsibility.

Loan is a form of credit activity in which banks or other financial institutions lend monetary funds at a certain interest rate and must return them. Loans in a broad sense refer to loans, discounts, overdrafts and other borrowing funds. Banks put concentrated money and monetary funds out through loans, which can meet the needs of expanding social reproduction and promoting economic development. At the same time, banks can also obtain loan interest income and increase their own accumulation.

Article 688 of the Civil Code of People's Republic of China (PRC) stipulates in the guarantee contract that the guarantor and the debtor shall be jointly and severally liable for the debt, which is a joint liability guarantee. When the debtor of joint and several liability guarantee fails to perform the due debt or the circumstances agreed by the parties occur, the creditor may request the debtor to perform the debt, or request the guarantor to assume the guarantee liability within the scope of its guarantee.