According to the provisions of the guarantee law, as a guarantor (4S shop), you can ask the guaranteed person (loan car buyer) to counter-guarantee the guarantor. That is to say, if you borrow money to buy a car and can't repay the bank loan on time, the guarantor has the right to claim compensation for you after compensating the car loan for the lender, and can sue the counter-guarantor in court to preserve the property of the counter-guarantor until the compensation is paid off by auction. The counter-guarantee contract is an additional contract, which takes effect with the loan contract; It is also terminated with the termination of the loan contract, so it is not a big problem not to fill in the loan amount and term. In addition, if the property is mortgaged, a separate mortgage contract must be signed. If they don't write down the mortgaged items and sign a mortgage contract with you, this counter-guarantee contract is a credit guarantee contract.