Legal analysis: It is also supported by law that white stripes are not handprinted, because generally speaking, contract documents such as white stripes are allowed by law as long as both parties sign, and the law does not force both parties to sign and press handprints, so as long as both parties sign, it is legal and effective, and handprints are mainly to prevent disputes.

Legal Basis: Provisions of the Supreme People's Court on Several Issues Concerning the Application of Laws in the Trial of Private Lending Cases Article 2 When a lender brings a private lending lawsuit to a people's court, it shall provide debt certificates such as IOUs, receipts, IOUs and other evidence that can prove the existence of the legal relationship between lending and borrowing.

If the creditor's rights certificate such as IOUs, receipts and IOUs held by the parties does not specify the creditor, and the party holding the creditor's rights certificate brings a private lending lawsuit, the people's court shall accept it. The defendant raised a factual defense against the plaintiff's creditor qualification, and the people's court ruled that the plaintiff did not have the creditor qualification after examination and dismissed the prosecution.