Signature theft can be verified by technical means. The first is to verify the actual flow of funds. According to the application, you can go to the relevant finance for investigation and verification, or ask the parties to provide relevant settlement vouchers. The second is to make comprehensive judgments and form inner conviction. Give full play to subjective initiative, restore the truth as much as possible, and make comprehensive judgments according to the parties' ability to pay, trading habits, amount and other factors to form inner conviction. The third is technical appraisal. Technical appraisal is the most direct and effective method to judge the authenticity of IOUs. Article 188 After accepting the application, the appraiser's court shall, when necessary, appraise the citizen who is requested to be appraised as having no or limited capacity for civil conduct. Where the applicant has provided expert opinions, the expert opinions shall be reviewed.