Legal analysis: It depends on whether the other party to the contract has reason to believe that a third party can sign an agency contract with him in your name. If not, it needs ratification, and if it refuses to recognize the contract, it is invalid. If the other party to the contract has reason to believe that the third party can sign the contract instead, the contract is valid and needs to bear corresponding responsibilities, but it can recover from the third party.

legal basis: article 919 of the civil code of the people's Republic of China

an entrustment contract is a contract in which the client and the agent agree that the agent will handle the client's affairs.

article 922 the agent shall handle the entrusted affairs according to the instructions of the principal. If it is necessary to change the instructions of the client, it shall be approved by the client; If it is difficult to get in touch with the client due to an emergency, the agent shall properly handle the entrusted affairs, but shall report the situation to the client in time afterwards.