Legal analysis: First of all, it is best to write our IOUs by hand, but handwriting is easy to be forged, so we need signatures and handprints at first, and the ID numbers of both parties are also essential. At last, we need to indicate the expiration date and the valid logo of the original. What must be clearly written in the content of the IOU is the date of the IOU or IOU and the repayment date. The IOU is valid within three years of the repayment date. On the IOUs and IOUs, we need to pay attention to mark the amount with capital Chinese entry and RMB ., otherwise it may be changed. In the IOUs and IOUs, it is necessary to indicate how the amount was traded, and if it is a bank, it is necessary to indicate the transfer log, so as to ensure that there is evidence to follow.

If the borrower is a minor, he needs to fill in his parents' names and ID cards, if he has a family, he needs to fill in his spouse's information, and if the IOUs and IOUs are typed, it is best to have a copy of the borrower's ID card as evidence.

In some large loans, you can ask a lawyer as evidence of the loan. Handwriting needs to follow the above specifications, and it is essential to pay attention to the amount, ID number, name, date and handprint.

legal basis: article 667 of the civil code of the people's Republic of China

a loan contract is a contract in which the borrower borrows money from the lender, returns the loan at maturity and pays interest.

article 668 a loan contract shall be in written form, unless it is otherwise agreed between natural persons to borrow money.

the contents of a loan contract generally include terms such as loan type, currency, purpose, amount, interest rate, term and repayment method.

article 669 when concluding a loan contract, the borrower shall provide the true information about the business activities and financial status related to the loan as required by the lender.