According to the relevant laws, it is illegal and criminal to fraudulently use someone else's signature, and serious cases will constitute a crime.

legal ground

Article 49 of the Law of People's Republic of China (PRC) on Public Security Administration Punishment: Whoever steals, swindles, robs, robs, extorts or intentionally damages public or private property shall be detained for more than five days and less than ten days, and may also be fined less than 500 yuan; If the circumstances are serious, he shall be detained for more than 10 and less than 15, and may also be fined less than 1000 yuan.

Article 266 of the Criminal Law of People's Republic of China (PRC) stipulates that whoever defrauds public or private property in a relatively large amount shall be sentenced to fixed-term imprisonment of not more than three years, criminal detention or public surveillance, and shall also or only be fined; 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 but not more than ten years and shall also be fined; If the amount is especially huge or there are other especially serious circumstances, he shall be sentenced to fixed-term imprisonment of not less than 10 years or life imprisonment, and shall also be fined or confiscated. Where there are other provisions in this Law, such provisions shall prevail.

People's Republic of China (PRC) Civil Code

Article 102 A natural person enjoys the right to his name, and has the right to decide, use, change or allow others to use his name according to law, provided that it does not violate public order and good customs.

Article 10 14. No organization or individual may infringe upon the right of name or name of others by interference, embezzlement or counterfeiting.