Legal analysis
Under normal circumstances, only my signature is valid, but if one party explicitly authorizes others to sign on his behalf, the signature of the agent is deemed to be my signature and valid. If you are under the age of 18, as legal representatives, the agreement signed by parents on behalf of their children is also valid and does not infringe their interests.
Personal recommendation
A contract that is not signed by me is invalid if it involves personal nature such as adoption, divorce and bequest. The validity of other contracts will be judged according to different situations.
1. If the signing agent obtains his authorization and signs the contract within the scope of authorization, the signing behavior at this time is valid and the contract is established and valid according to law.
2. If the signing agent enters into a contract with a third party in the name of another person without his own authorization, the effectiveness of the contract belongs to unauthorized agency according to law, and the effectiveness caused by it is to be determined;
The validity of the contract depends on my approval. If I approve, this contract will take effect for me. If I don't approve or refuse to approve, the contract has no legal effect on me. At this time, the contract has no effect.
legal ground
Article 171 of the Civil Code stipulates that if an actor acts as an agent without ratification by the principal, he has no power of agency, exceeds his power of agency or terminates his power of agency, it will have no effect on the principal.
The counterpart may urge the principal to ratify it within 30 days from the date of receiving the notice. If the trustor fails to declare it, it shall be deemed as refusal to ratify it. 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 act committed by the actor is not ratified, the bona fide counterpart has the right to demand the actor to perform the debt or demand the actor to compensate for the damage he has suffered. However, the scope of compensation shall not exceed the benefits that the counterpart can obtain when the principal ratifies.