It depends on the official seal and date of the enterprise. Generally speaking, these are in duplicate. If the regular units are all in triplicate, you must read the contents carefully before signing the contract to see if it is reasonable and legal. If you feel that it is unreasonable and seriously infringes on individual rights and obligations, you can ask the person in charge of the enterprise without signing it. User in job q: anonymous user.

Whether it is effective or not depends on whether there is an official seal of the enterprise. In addition, the signatory can be the relevant leader of the human resources department, but it must be stamped with the official seal of the enterprise, because only the official seal of the enterprise is the enterprise behavior, and the signatory is the duty behavior. However, it should be noted that if the words signed by the enterprise as a legal person are indicated in the signature, it is not acceptable for others to sign, but it will not affect the effectiveness of the labor contract. Let's just say there are some defects. The most important thing is to have the official seal of the enterprise. From Q User: Mr. Chen