IOU (format): 1. Title: IOU; 2. Content: What amount of money (RMB) is owed to someone today (in capital letters: ); if the debtor agrees, you can also write "This payment should be Return it on a certain day of a certain year and a certain month. If the debt is not returned within the time limit, liquidated damages can be agreed; 3. The debtor: If it is an individual, the full name should be written, and the name should be the name on the ID card, and a fingerprint should be stamped. If it is a legal person, the full name of the legal person should be written and stamped. 4. Indicate the time of payment.