A legally binding IOU written to parents should contain the following contents:

1. The full legal names of the borrower and lender should be written clearly;

2. The loan amount should be written clearly, including the amount in uppercase and lowercase letters;

3. The loan time period should be written clearly, including the start, month and day of the loan and a clear loan period;

4. The specific year, month and day of repayment should be written clearly;

5. The interest on the loan should be written clearly, there should be a clear annual interest rate or monthly interest rate, and the final total amount of loan interest payable (including capital letters and the amount in small letters);

6. The year, month, day, time and method of payment for the repayment of the loan principal and interest should be clearly written;

7. The borrower should have his or her signature, fingerprint or Handwritten signature.

Methods for not repaying the IOU when the time comes:

1. If there is an IOU, IOU or contract, and if negotiation fails, you can sue to the court and ask the other party to pay;

2. If no one can be found, service can be announced and a default judgment can be made;

3. If the other party fails to pay after winning the lawsuit, you can apply to the court for enforcement.

To sum up, the IOU must state the time of borrowing, the amount of the loan, the length of the loan, the purpose of the loan, the interest on the loan, the liability for breach of contract if the loan is overdue, and if there is a guarantor, the period of the guarantee and the amount of the loan. responsibility.

Legal basis:

Article 143 of the "People's Republic of China and Civil Code"

Civil legal acts that meet the following conditions are valid:

(1) The actor has the corresponding civil capacity;

(2) The intention is true;

(3) It does not violate laws and administrative regulations Mandatory regulations that do not violate public order and good customs.

Article 145

Civil legal acts performed by persons with limited capacity for civil conduct that are purely for profit or civil legal acts that are commensurate with their age, intelligence, and mental health conditions Valid; other civil legal acts carried out shall be valid upon consent or ratification by the legal agent.

The counterparty may urge the legal representative to ratify it within thirty days from the date of receipt of the notice. If the legal representative fails to make any representation, it shall be deemed as a refusal to ratify. Before a civil legal act is ratified, a bona fide counterparty has the right to revoke it. Cancellation shall be made by notification.