Whether the proxy signature has legal effect needs specific analysis. The following is the analysis: if someone else signs the contract, he has the right to act as an agent and the contract is valid. If it is an unauthorized agent, the validity of the contract is to be determined, and the other party may urge the principal to ratify it within one month from the date of receiving the notice. If the principal does not declare, it shall be deemed as refusal to ratify and the contract shall be invalid. Before the act committed by the actor is ratified, the bona fide counterpart has the right to revoke it. Revocation shall be made by notice. If the actor has no power of agency, exceeds the power of agency or terminates the power of agency, he still carries out the agency behavior. If the counterpart has reason to believe that the actor has the right of agency, the agency act is valid and the contract is valid. This is an agency by estoppel.

First, is it illegal to sign on behalf of others?

1, it is not necessarily illegal to sign someone else's name. A contract signed by a legal agent or an entrusted agent instead of the principal is a valid contract;

2. If a contract is signed in the name of another person beyond the agency authority or without the right to act as an agent, its validity is to be determined, and it will be effective after the subsequent ratification by the principal, otherwise it will be invalid. If the principal is at fault, which leads to the occurrence of agency by estoppel, the contract is valid, except that the other party is a malicious third party.

Second, is the signature of the previous generation illegal in law?

1, it is not illegal to be legally authorized or entrusted to sign on behalf of others, otherwise it will violate the relevant provisions of civil agency.

2. That is, it is legal to authorize others to sign on behalf of the principal, and the signature behavior carried out by the signing agent in the name of the principal within the agency authority is valid for the principal;

3. It is illegal to sign a contract without authorization, and it is necessary to bear the legal risks brought by the contractor's disapproval.

Third, what should I do on behalf of the signing?

1. According to the authorization of the licensor, it is legal to sign on behalf of the licensor. This phenomenon is very common in real life. Some are trivial matters of life, others are important economic activities and important matters, and the client authorizes others to sign them.

2. For example, it is normal for customers to give their ID cards and power of attorney to customers to pick up express mail or even sign contracts.

Legal basis:

People's Republic of China (PRC) Civil Code

Article 925 A contract concluded by the agent with a third party in his own name within the scope authorized by the principal, if the third party knew the agency relationship between the agent and the principal when concluding the contract, the contract directly binds the principal and the third party; However, unless there is definite evidence to prove that the contract is only binding on the trustee and the third party.

Article 161 A civil subject may carry out a civil juristic act through an agent. In accordance with the provisions of the law, the agreement of the parties or the nature of civil legal acts, civil legal acts that should be implemented by themselves shall not be represented.

Article 162 A civil juristic act carried out by an agent in the name of the principal within the scope of his agency authority is effective for the principal.

Article 163 Agency includes entrusted agency and legal agency. An entrusted agent shall exercise the power of agency as entrusted by the principal. A legal agent shall exercise his power of agency in accordance with the provisions of the law.

Legal basis:

civil law

Article 169

If an agent needs to entrust a third party to act as an agent, it shall obtain the consent or ratification of the principal. If the entrusted agent is approved or ratified by the principal, the principal may directly instruct the entrusted third party on the agency affairs, and the agent is only responsible for the choice and instruction of the third party. If the entrusted agent is not approved or ratified by the principal, the agent shall be responsible for the behavior of the entrusted third party; However, in an emergency, in order to safeguard the interests of the principal, the agent needs to entrust a third party.