Legal analysis: Our country's law does not clearly stipulate which finger to use to press the fingerprint when signing a contract. Generally speaking, press the fingerprint with the thumb or forefinger of the right hand. But according to the order of fingerprints, it is the index finger, thumb and middle finger of the right hand. If the finger of the right hand cannot meet the requirements due to special circumstances, it can be replaced by the index finger, thumb and middle finger of the left hand in turn, and it is best to indicate it in the fingerprint.

Legal basis: Article 490 of the Civil Code of People's Republic of China (PRC). 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.