If the parties press their fingerprints on the contract, the people's court shall determine that it has the same legal effect as the signature or seal. What is clear here is that fingerprinting has the same legal effect as signature or seal, not to solve the problem of contract effectiveness, that is, it does not mean that the contract must be effective, because the evaluation of contract effectiveness depends on the will of the state rather than the will of the parties to the contract. Even if fingerprinting, signature and seal are true and effective, and the contract itself has one of the circumstances stipulated by relevant laws, it is still invalid. Whether a contract is established depends on whether the parties' expressions of will are consistent. The authenticity and validity of fingerprints, signatures and seals is a prerequisite for the authenticity and validity of the parties' will. As for the authenticity of fingerprints, it needs to be solved in the distribution of burden of proof.

A valid protocol needs to meet the following conditions:

1, which has been expressed and agreed by both parties;

2. Both parties have corresponding civil capacity;

3. The content of the contract does not violate the legal provisions or social public order and good customs.

To sum up, if the parties conclude 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.

Legal basis:

Article 143 of the Civil Code of People's Republic of China (PRC)

A civil juristic act that meets the following conditions is valid:

(1) The actor has corresponding capacity for civil conduct;

(2) the meaning is true;

(three) does not violate the mandatory provisions of laws and administrative regulations, and does not violate public order and good customs.

Article 490

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.