According to the provisions of the Civil Code, if the parties conclude a contract in the form of a contract, the contract shall be established when both parties sign or seal it. According to this provision, the signatures or seals of the parties to a contract have legal effect. In fact, the private seal of the legal representative or authorized representative can replace the signature in legal effect. If you sign a labor contract with an enterprise in practice, it is best to obtain the signature of the legal representative, not the private seal. Generally speaking, because there is no administrative record for this kind of private seal, it is difficult to determine its authenticity once a dispute occurs. Therefore, when examining the signature of the other party to the contract, it is suggested that the legal representative of the other party sign it in person and try to avoid affixing a private seal. Legal basis:

Article 490 of the Civil Code of People's Republic of China (PRC): If the parties conclude a contract in the form of a contract, the contract is concluded 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 have not agreed in writing, but one party has fulfilled its main obligations and the other party accepts it, the contract is established.