1. Exempted due to the borrower's repayment obligations and the elimination of the main debt;

2. Exemption, because the lender exempts the borrower from the repayment obligation;

3. Exemption due to the lender's waiver of the security right;

4. Exemption for exceeding the warranty period;

5. Exemption beyond the limitation period.

Guarantee contracts include mortgage contracts, pledge contracts and other contracts with guarantee functions.

Legal basis: Article 388 of the Civil Code of People's Republic of China (PRC) establishes a security interest, and a security contract shall be concluded in accordance with this law and other laws. Guarantee contracts include mortgage contracts, pledge contracts and other contracts with guarantee functions. The guarantee contract is a subsidiary contract of the main creditor's rights and debts contract. If the principal creditor's rights and debts contract is invalid, the guarantee contract is invalid, unless otherwise stipulated by law.

If the debtor, guarantor and creditor are at fault after the guaranty contract is confirmed to be invalid, they shall bear corresponding civil liabilities according to their faults.