The term of validity of the loan slip is actually the limitation of action of the loan slip. The term of validity of the loan slip depends on the content of the loan slip. If the repayment time is not specified, the limitation of action is three years from the date when the lender requests repayment.
 If the time of repayment is specified in the loan slip, it shall be two years from the date of expiry of the repayment period. If the loan slip does not specify the date of repayment, the creditor can demand the debtor to repay at any time, and the debtor can also repay the creditor at any time. The loan slip is a debt dispute;
 As long as the creditor has evidence to show that he has claimed his rights within the limitation period, the limitation period will be recalculated, but the maximum limitation period shall not exceed 20 years.
 [Legal Basis]
 In Article 188 of the Civil Code, the limitation period of action for requesting the people's court to protect civil rights is three years. If the law provides otherwise, such provisions shall prevail.
 The limitation period of action shall be counted from the date when the obligee knows or should know that his rights have been damaged and the obligor. If the law provides otherwise, such provisions shall prevail.
 However, if it has been more than 20 years since the date of damage to rights, the people's court shall not protect them. Under special circumstances, the people's court may decide to extend them on the application of the obligee.