Handwritten IOUs without fingerprints, if stamped or signed, have legal effect. There is no need to print the IOUs, as long as the reasons and amount of IOUs are clearly written, signed by the debtor, and the handwritten IOUs have legal effect. If the parties enter into a contract in the form of a contract, the contract shall be established when the parties sign, seal or press their fingerprints. Before signing, sealing or fingerprinting, one party has fulfilled its main obligations, and the contract is established when the other party accepts it. A contract shall be concluded in written form as stipulated by laws, administrative regulations or agreed by the parties. If the parties do not do this in writing, but one party has fulfilled its main obligations and the other party accepts it, the contract is established.

The IOU needs to write the following contents to be correct:

(1) IOUs shall be in written form, unless otherwise agreed between natural persons;

(2) The contents of IOUs generally include loan type, currency, purpose, amount, interest rate, term, repayment method, etc.

(3) IOUs must have the basic information, signature and date of the parties.

To sum up, in the loan contract, the rights and obligations of both borrowers and borrowers are clearly defined to protect the legitimate rights and interests of both parties. In addition, handwritten IOUs usually have legal effect in law, but supplementary evidence may be needed in case of dispute. Therefore, when signing a loan contract, we should carefully consider and follow the legal provisions to ensure the validity and legality of the contract.

Legal basis:

People's Republic of China (PRC) Civil Code

Article 668

A loan contract shall be in written form, unless otherwise agreed between natural persons.

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