Illegal. The guarantor cannot sign for various reasons. If the real guarantor knows that you are signing for him, let him issue a power of attorney. Forging the signature of the guarantor, the validity of the guarantee contract is to be determined, and it will not have legal effect on the guarantor without ratification by the guarantor. If so, it may be suspected of loan fraud; In addition, from a civil point of view, it means that there is no actual guarantor. Forged signatures and fingerprints belong to forged evidence, and legal responsibilities can be investigated according to the purpose and circumstances of forged evidence. 2. Article 111th of the Civil Procedure Law stipulates that the people's court may impose a fine or detention according to the seriousness of the case if a litigant or other person commits one of the following acts; Those who constitute a crime shall be investigated for criminal responsibility according to law: those who forge or destroy important evidence and obstruct the trial of the people's court.

Legal objectivity:

Article 143 of the Civil Law of People's Republic of China (PRC) is valid if a civil juristic act meets the following conditions: (1) The actor has corresponding capacity for civil conduct; (2) the meaning is true; (three) does not violate the mandatory provisions of laws and administrative regulations, and does not violate public order and good customs. Article 469 of the Civil Code of People's Republic of China (PRC) * * * The parties may conclude a contract in writing, orally or in other forms. Written form refers to contracts, letters, telegrams, telexes, faxes and other forms that can tangibly express the contents contained. A data message that can tangibly express its content through electronic data interchange, e-mail, etc. , and can be retrieved at any time, are considered in writing.