Article 32 of the Contract Law stipulates that if the parties conclude a contract in the form of a contract, the contract is established when both parties sign or seal it. Therefore, in practice, when signing an enterprise contract with a company, it often needs the signature of the legal representative before the contract can be established. In fact, there are many enterprise contracts that need to be signed, and it may be difficult for legal representatives to sign them when they need to sign them. So the practice of replacing signature with private seal appeared. In fact, the private seal of the legal representative or authorized representative can replace the signature in legal effect. 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. Therefore, lawyers suggest that if a labor contract is signed with an enterprise in practice, it is best to obtain the signature of the legal representative, rather than a private seal. Legal basis: Article 32 of People's Republic of China (PRC) Contract Law. If the parties conclude a contract in the form of a contract, the contract shall be established when both parties sign or seal it.