A contract can be effective in some cases if it is not signed. Under normal circumstances, a contract can become legally effective after it is signed. Our country's law stipulates that the contract is established when it is signed or sealed, so the seal will also have legal effect. If the parties conclude a contract in the form of letters, data messages, etc., they may request to sign a confirmation letter before the contract is established. The contract was established when the confirmation letter was signed. Therefore, the contract can be effective in some cases without signing it. Legal objectivity:

Article 143 of the Civil Code of the People's Republic of China is valid for a civil juristic act that meets the following conditions: (1) The actor has corresponding capacity for civil conduct; (2) the meaning is true; (three) does not violate the mandatory provisions of laws and administrative regulations, and does not violate public order and good customs. Article 49 of the Civil Code of the People's Republic of China If the parties conclude a contract in the form of a contract, the contract shall be formed when all 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.