The signed contract may constitute the crime of contract fraud, and other corresponding may constitute financial fraud and bill fraud.
If it is in the course of litigation, it may constitute the crime of obstructing testimony and perjury.
If it is a fake star signature for sale, it should be an infringement of the right to name, and if the amount is particularly large, it can also be considered as fraud.
If someone else pretends to be my signature without my knowledge, I won't ratify it, I won't bear legal responsibility, and the signatory will bear the responsibility; If it is approved, I should bear the responsibility.
Signing on behalf of the agent is the behavior. If I don't know, I have no right to represent and I don't bear legal responsibility. However, if I know that someone else signed my name without denying it, or that I ratified it, the signature is binding on me and I should bear legal responsibility.
Objectively, it is manifested in the use of fraud to defraud a large number of public and private property. First of all, the perpetrator committed fraud, which includes two forms: one is to fabricate facts, the other is to conceal the truth; Essentially, it is an act that makes the victim fall into a wrong understanding. The content of fraud is that under certain circumstances, the victim will have a wrong understanding and make the property disposal that the perpetrator wants. Therefore, whether it is fiction or concealment of past facts, or present facts and future facts, as long as the above contents are available, it is fraud. If the fraudulent content does not make them dispose of their property, it is not fraudulent fraud. Fraud must reach the point where ordinary people can have a wrong understanding and exaggerate the goods they sell. If it is not beyond the tolerance of society, it is not fraud. There are no restrictions on the means and methods of fraud, which can be verbal fraud or action fraud; Fraud itself can be either an act or an omission, that is, it has the obligation to inform a certain fact, but failure to fulfill this obligation makes the other party fall into a wrong understanding or continue to fall into a wrong understanding, and it also belongs to fraud if the actor uses this wrong understanding to obtain property. According to the provisions of Article 300 of this Law, anyone who organizes or uses religious sects or cult organizations or uses superstition to defraud property shall be punished as fraud.
Legal basis:
People's Republic of China (PRC) Civil Code
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.