according to the law, the employer should sign the labor contract with the laborer. That is, it is signed by the legal representative and stamped with the official seal of the enterprise. The company in this case did not affix its official seal to the labor contract, which is not in line with the provisions of the labor law. However, this problem is mainly caused by the company's fault, and the company should bear the main responsibility. Therefore, although the contract is not stamped with the official seal, after all, someone signed on behalf of the company (although it is the account manager, the company must have granted the right), and the account manager entered into the contract on behalf of the company. A contract cannot be deemed invalid just because it has no official seal.