According to the relevant laws of our country, a contract is generally valid only if it is signed. Since there is an optional relationship between signature and seal, any one of them is valid. When signing a written contract, it is not necessary to sign and seal it at the same time. As long as the content of the contract complies with legal provisions, does not violate public order and good customs, and is signed only, the contract is valid.

Legal Basis

Article 502 of the Civil Code A contract established in accordance with the law shall take effect from the time of its establishment, unless otherwise provided by law or otherwise agreed upon by the parties. In accordance with the provisions of laws and administrative regulations, if the contract should be subject to approval and other procedures, the provisions shall be followed. If the failure to go through approval and other procedures affects the effectiveness of the contract, it will not affect the effectiveness of the contract's obligations such as reporting for approval and the effectiveness of related clauses. If the party that should go through the application approval and other procedures fails to perform its obligations, the other party may request that it bear liability for violating such obligations. In accordance with the provisions of laws and administrative regulations, if the modification, transfer, termination, etc. of a contract require approval and other procedures, the provisions of the preceding paragraph shall apply.