Legal analysis
If someone else authorizes it, you don't have to bear it. If there is no authorization or ratification from others, then you need to bear the corresponding responsibility. It is illegal to sign on behalf of others without the entrustment or authorization of the client, and criminal responsibility should be borne if the circumstances are serious. For example, if a national civil servant signs an important request without the consent, approval or authorization of the person who has the right to deal with it, causing heavy economic losses or casualties, he will bear criminal responsibility. If the actor has no power of agency, exceeds the power of agency, or the contract concluded in the name of the principal after the termination of the power of agency is not ratified by the principal, the act is illegal and has no effect on the principal, and the actor shall bear the responsibility. If the above conditions are not met, the act is not illegal and the contract is valid. When entrusting others to exercise their legitimate rights and interests on their behalf, the client shall show the legal documents of the client when exercising his power. The trustor shall not abandon the entrusted matters for any reason. If the client makes any rights and interests that violate national laws, the client has the right to terminate the entrustment agreement. Within the scope of the legitimate rights and interests of the principal's power of attorney, all the duties exercised by the principal shall be borne by the principal, and the principal shall not bear any legal responsibilities.
legal ground
Article 490 of the Civil Code of People's Republic of China (PRC): If the parties conclude a contract in the form of a contract, the contract is concluded when 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. A contract shall be concluded in written form as stipulated by laws, administrative regulations or agreed by the parties. If the parties do not do this in writing, but one party has fulfilled its main obligations and the other party accepts it, the contract is established.