1. The full legal names of the borrower and the 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 and end years of the loan. Date and 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 uppercase and lowercase amounts) ) and other agreements 6. The year, month, day, time and method of payment for the repayment of the principal and interest of the loan should be written clearly. 7. The borrower should have his or her signature, fingerprint or handwriting. Only with a valid IOU can you pursue recovery in the event of a debt dispute.

Legal basis:

"People's Republic of China and Civil Code"

Article 667 A loan contract means that the borrower borrows money from the lender , a contract to return the borrowed money and pay interest when due.

Article 668: A loan contract shall be in writing, unless otherwise agreed upon for a loan between natural persons. The content of a loan contract generally includes terms such as loan type, currency, purpose, amount, interest rate, term and repayment method.

Article 669: When entering into a loan contract, the borrower shall provide the true situation of business activities and financial status related to the loan as required by the lender.