2. If the repayment time is indicated on the loan slip, it shall be two years from the date when the repayment period expires.
3. If there is no agreed repayment date on the IOU, the creditor may demand repayment from the debtor at any time, and the debtor may also repay the creditor at any time.
4. IOUs are debt disputes. 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 longest period shall not exceed 20 years.
Legal basis: Article 5 1 1 of the Civil Code of People's Republic of China (PRC). If the parties have not clearly agreed on the contents of the relevant contract and cannot be determined according to the provisions of the preceding article, the following provisions shall apply:
(a) the quality requirements are not clear, in accordance with the mandatory national standards; If there is no mandatory national standard, it shall be implemented in accordance with the recommended national standard; If there is no recommended national standard, it shall be implemented in accordance with industry standards; If there is no national standard or industry standard, it shall be implemented according to the usual standard or the specific standard that meets the purpose of the contract.
(2) If the price or remuneration is not clear, it shall be performed according to the market price at the place of performance when the contract is concluded; If government pricing or government-guided pricing should be implemented according to law, it shall be implemented in accordance with the provisions.
(3) Where the place of performance is unclear, if payment is made in currency, it shall be performed at the place where the party receiving the currency is located; Where real estate is delivered, it shall be performed at the place where the real estate is located; Other targets shall be performed at the place where the party performing the obligations is located.
(4) If the time limit for performance is not clear, the debtor may perform at any time, and the creditor may also request performance at any time, but the other party shall be given the necessary preparation time.
(5) If the method of performance is not clear, it shall be performed in a way conducive to the realization of the purpose of the contract.
(six) if the burden of performance expenses is not clear, it shall be borne by the party performing the obligation; The performance expenses increased due to the creditor's reasons shall be borne by the creditor.