A contract with only an official seal and no signature of a legal person is valid. A contract with an official seal or signature of a legal person has the same effect.

1. What are the conditions for a valid contract?

The conditions for a valid contract are that the parties concerned have the corresponding capacity for civil conduct. This is a basic condition. There are also three conditions: the intention of the parties is true and does not violate the law or social welfare. The subject of the contract must be certain and possible. The main conditions for the validity of the contract are these four conditions. Only if these four conditions are met, the contract will be valid. , the specific introduction is as follows:

1. The parties have the corresponding civil capacity

The civil capacity includes the contractual capacity and the corresponding contracting capacity. This is the party's understanding and grasp of the contract. development status and basic conditions for legal effects. In principle, a natural person must have full capacity to sign a contract. Persons with limited capacity and persons without capacity are not allowed to sign a contract in person, but must be signed by their legal agent on their behalf. A person with limited capacity may independently sign a contract of pure interest or a contract commensurate with his age, intelligence, and mental health. For non-natural persons, they must have the capacity to contract after being established in accordance with legal procedures. At the same time, they must have the corresponding contracting ability, that is, they must sign contracts within the scope of authority granted by laws, administrative regulations, and relevant departments.

2. The party’s expressed intention is true

The contracting party’s expressive behavior should truly reflect its inner effective intention, that is, its effective intention is consistent with the expressed act. If the expression of intention is untrue, the impact on the validity of the contract shall depend on the specific circumstances. In case of general misunderstanding etc., the contract remains valid. In the event of a major misunderstanding, the contract may be changed or revoked. The contract may be changed or revoked if the contract is unfair due to taking advantage of others' predicament. When a contract is established due to fraud or coercion, if the national interests are harmed, the contract will be invalid; if the national interests are not harmed, the contract can be changed or revoked.

3. Does not violate the law or social public interests

4. The subject matter of the contract must be certain and possible

The subject matter of the contract determines the quality of the rights and obligations of the contract. and quantity. Without it, the contract will lose its purpose, lose its positive meaning, and should be invalid. The possibility of the subject matter of the contract refers to the possibility that the contractual benefits may be realized. The determination of the subject matter of the contract refers to the determination of the subject matter of the contract from the beginning, or the determination of the subject matter.

Legal basis

"People's Republic of China and Civil Code"

Article 490

The parties adopt a contract If a contract is concluded in a formal form, the contract is established when both parties sign, seal or fingerprint it. Before signing, sealing or fingerprinting, one party has performed its main obligations and the contract is established when the other party accepts it. Laws and administrative regulations stipulate or the parties agree that a contract should be concluded in written form. If the parties do not use written form but one party has performed its main obligations and the other party accepts it, the contract is established.