Legal analysis: It is illegal to sign a contract under a false name. Serious cases will constitute the crime of contract fraud. If one party signs a contract under a pseudonym, which causes the other party to express its true meaning and is beneficial to itself, it is fraud. This kind of behavior is an illegal civil behavior, which may lead to the absolute invalidity of the contract from the beginning. Signing a contract under an alias may be suspected of contract fraud. According to the regulations, if the parties conclude a contract in the form of a contract, they shall form a contract when both parties sign or seal it.

Legal basis: Article 490 of the Civil Code of People's Republic of China (PRC). If the parties enter into a contract in the form of a contract, the contract shall be established when the parties sign, seal or press their fingerprints. 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.