First, need. Official letters, documents and reports issued by the company to the outside world shall be stamped with official seals, and documents stamped with official seals shall have legal effect. If there is no official seal, it has no legal effect. The quotation in a unified format with the company logo is an invitation to offer and has no legal effect.

2. Articles 32 and 44 of China's Contract Law stipulate: "If the parties conclude a contract in the form of a contract, the contract is established when both parties sign or seal it." "A contract established according to law shall take effect upon its establishment.

Extended data

The official seal has the function of representing the company. In addition to signing contracts, it can also involve all affairs of the company, such as documents, notices, certificates, etc., and has administrative functions.

Use of official seal:

Any unit using the official seal must strictly abide by the leadership examination and approval system. That is, every use of the official seal of the unit must be made by the legal representative of the unit? After approval, when the legal representative of the unit goes out or other important tasks cannot be approved, the legal representative of the unit must also authorize the deputy and other appropriate personnel to approve the use. The specific handler shall not use the official seal of the unit to handle anything without authorization.

Official seal of Baidu Encyclopedia