It is generally not illegal to sign a contract on behalf of someone, but if the contract signed on behalf of someone constitutes the crime of contract fraud, it is a criminal act. If the amount is relatively large, the person shall be sentenced to fixed-term imprisonment of not more than three years or criminal detention, and shall also or solely be fined the amount. If the crime is serious or there are other serious circumstances, he shall be sentenced to fixed-term imprisonment of not less than three years but not more than ten years, and shall also be fined.

It is not illegal to sign a contract if there is a legal and valid agency agreement, other provisions of the law, etc. The Civil Code stipulates that a civil subject may perform civil legal acts through an agent; civil legal acts performed by an agent in the name of the principal within the scope of agency authority shall be effective against the principal.

Is it illegal not to sign a labor contract?

1. It is illegal not to sign a labor contract. It is illegal for a company not to sign a labor contract. According to legal treaties, the employer must sign a labor contract with its employees. Contract, this is a legal obligation. Failure to sign a labor contract will be illegal for the unit and the price will be greater:

(1) The employer has been employed for more than one month but less than one month since the date of employment. If a written labor contract has not been concluded with the employee within 20 years, the employee shall be paid twice the monthly salary. According to this provision, workers can claim double the wage difference for up to 11 months;

(2) If the employer fails to conclude a written labor contract with the worker for one year from the date of employment, it will be deemed as The employer and the employee have signed a labor contract without a fixed term;

(3) If the employer fails to sign a labor contract without a fixed term when it should sign it with the employee, it shall sign a labor contract without a fixed term. From now on, workers will be paid twice their monthly wages. Workers claim double wages in accordance with this provision, and there is no maximum time limit.

I hope the above content will be helpful to you. If you have any other questions, please consult a professional lawyer.

Legal basis: Article 224 of the "Criminal Law of the People's Republic of China" has one of the following circumstances: for the purpose of illegal possession, in the process of signing and performing a contract, defrauding the other party Property, if the amount is relatively large, he shall be sentenced to fixed-term imprisonment of not more than three years or criminal detention, and concurrently or solely with a fine. If the amount is huge or there are other serious circumstances, he shall be sentenced to fixed-term imprisonment of not less than three years and not more than 10 years, and shall also be fined. If the amount is particularly huge or If there are other particularly serious circumstances, the person shall be sentenced to fixed-term imprisonment of not less than ten years or life imprisonment, and shall also be fined or have property confiscated:

(1) Signing a contract with a fictitious unit or in the name of another person;

(2) Using forged, altered, invalidated bills or other false property rights certificates as guarantee;

(3) Having no actual ability to perform, performing small-amount contracts first or partially performing them Contract methods, to induce the other party to continue signing and performing the contract;

(4) Accepting the goods, payment, advance payment or guaranteed property from the other party and then escaping;

( 5) Using other methods to defraud the other party of property.