To make an IOU for an individual loan, there must be elements such as the name of the creditor, the loan amount, interest calculation, repayment time, liquidated damages, dispute resolution method, debtor's name, loan date and so on. 1. Legal full names of the borrower and the lender. 2 loan amount, including the amount in words and figures. 3. Term of the loan, including the beginning and end of the loan, year, month, day and the determined loan term. 4. Specific repayment date. 5. The loan interest should have a clear annual interest rate or monthly interest rate, and the final total loan interest payable (including the amount expressed in words and figures). 6. The year, month, day, time and payment method of repayment of loan principal and interest. 7. The borrower shall have his own signature, handprint or handwritten signature. Extended information: a written document indicating the relationship between creditor's rights and debts, usually written and signed by the debtor, indicating that the debtor has owed the creditor the amount indicated in the IOU. After the money is returned, the drawer takes back the bill, which is invalid or torn. This is a kind of written evidence. Usually used in daily life and business management. From the legal point of view, IOU is a written document showing the relationship between creditor's rights and debts. Generally, it is written and signed by the debtor, indicating that the debtor has owed the creditor the debt with the amount indicated in the IOU.