The promissory note is signed by the guarantor in two times, and it is valid if the guarantor, the borrower and the lender are all made by people with corresponding civil capacity, and the intention is true and legal, and there is no invalid situation stipulated by law.

legal ground

Article 143 of the Civil Code

A civil juristic act that meets the following conditions is valid:

(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 20 of the Provisions of the Supreme People's Court on Several Issues Concerning the Application of Laws in the Trial of Private Lending Cases.

If another person signs or seals the creditor's rights certificate or loan contract such as IOUs, receipts and IOUs, but fails to indicate that he is the guarantor or assumes the guarantee responsibility, or cannot be presumed as the guarantor through other facts, and the lender requests him to assume the guarantee responsibility, the people's court will not support it.