My classmates asked me to prove it, asking for my ID card, photo, signature and handprint. According to the relevant public information, this is a normal procedure and needs to be verified. It is also necessary to confirm the inquiry record, signature and fingerprint of the investigation and verification. Article 59 of the Provisions on the Procedures for Handling Criminal Cases by Public Security Organs stipulates that when a public security organ obtains evidence from relevant units and individuals, it shall be approved by the person in charge of the case-handling department and issue a notice of evidence collection. The requested unit or individual shall stamp or sign the notice, and if it refuses to stamp or sign, the public security organ shall indicate it.