Legal analysis
If both parties affix official seals, but there is no legal representative to sign, the contract is established. If both parties actually perform their respective obligations under this contract, this contract has come into effect and has legal effect. In practice, it is normal for both parties to affix their official seals or contract seals, but no one can sign them. After all, all contracts are signed by legal persons, which takes a long time. If the other party does not clearly indicate that a contract that cannot be signed by anyone is invalid or ineffective, it is presumed to be valid. If the parties conclude a contract in the form of a contract, the contract shall be established when both parties sign or seal it. A legally established contract shall take effect upon its establishment. In addition, as long as it is proved that the signing of the contract belongs to both parties, the contract is considered to be established. However, only the official seal on the contract without the signature of the legal representative generally does not affect the effectiveness of the contract, because the official seal has met the effective requirements of the contract. To say the least, even if both parties agree in the contract that the contract will take effect after it is signed and stamped with the official seal, according to the precedent of the Supreme Court, as long as the contract stamped with the official seal conforms to the true intention of both parties, even if it is not signed by the legal representative, the contract is still valid.
legal ground
People's Republic of China (PRC) Civil Code
Article 490 Where the parties conclude a contract in the form of a contract, the contract is formed 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 do not do this in writing, but one party has fulfilled its main obligations and the other party accepts it, the contract is established.
Article 502 A lawfully formed contract shall become effective upon its formation, unless otherwise provided by law or agreed by the parties. In accordance with the provisions of laws and administrative regulations, if the contract should go through the approval procedures, such provisions shall prevail. If the failure to go through the formalities such as approval affects the effectiveness of the contract, it will not affect the performance of the obligation clauses such as approval and the effectiveness of relevant clauses in the contract. If the party that should go through the formalities for approval fails to perform its obligations, the other party may require it to bear the responsibility for violating its obligations. The modification, assignment and dissolution of a contract shall be subject to the provisions of laws and administrative regulations, and the provisions of the preceding paragraph shall apply and shall be subject to approval.