At present, China's law does not stipulate that a contract must be signed and sealed, and one copy is enough.

However, if it is stamped, it is best to use the special seal for the contract of the unit. The special seal for contract has covered the legal person's intention to sign the contract. As long as the seal is authentic, that is, it represents the will of the legal person, it is not necessary to have the signature of the legal representative.

But in general, in order to ensure that the legal effect of the contract is substantially recognized, it is best to have the signature of the person in charge or the legal representative.

legal ground

Article 490 of the Civil Code

If the parties enter into a contract in the form of a contract, the contract shall be established when the parties sign, seal or press their fingerprints. Before signing, sealing or fingerprinting, one party has fulfilled its main obligations, and the contract is established when the other party accepts it.