Legal analysis: no need to press fingerprints. Sign your name and press your handprint. This receipt has legal effect. To judge whether a handwritten receipt has legal effect, we should analyze it from the content of the receipt and the subject ability of the person who issued it. As long as the person who issued the receipt has the corresponding capacity for civil conduct and civil liability, the contents of the receipt are legal, and the person who issued the receipt personally signs and confirms, this evidence has legal effect. If there is any dispute over the authenticity of this IOU, both parties should first explain and cross-examine some issues.

Legal basis: Civil Code of People's Republic of China (PRC).

Article 490 Where the parties conclude a contract in the form of a contract, the contract is formed when the parties sign, seal or fingerprint it. 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.

Article 493 Where a contract is concluded by the parties in the form of a contract, the place where the contract is finally signed, sealed or fingerprinted is the place where the contract is established, unless otherwise agreed by the parties.