1, Question A: No.2, font is Founder Minor Song or bold, and the main content to be proved is generally used as the topic. For example, "proof that X took bribes." Don't just write "proof materials" or "letter of proof" or "proof", because it will bring inconvenience to the other unit to find and use these materials in the future.

2. Text: No.3, font imitation of Song Dynasty. The true situation of the relevant personnel or events that need to be proved shall be clearly written. If it is evidence of investigation, it can also provide relevant investigation clues.

3. Signature: After the certification materials are written, the full name of the unit or individual providing the certification materials should be written at the lower right of the certification materials, and the certification date should be indicated.

4. Full text format: upper 3, lower 2.5, left 2.6, right 2. Extended data. Write proof materials should pay attention to the following questions:

5. The person who issues the certification materials should treat it with a high degree of responsibility and seriousness to the parties and the attested person, adhere to the principle of seeking truth from facts, and may not issue a certificate that is inconsistent with the facts for personal reasons, let alone forge a certificate.

2. The language of the certification materials shall be clear and unambiguous, and words such as "probably", "possibly" and "according to the analysis" shall not be used.

6. All certification materials shall be reviewed by the person in charge of the unit and stamped with the official seal. The certification materials issued by individuals should be signed and sealed by themselves (or by fingerprints), and the unit should indicate the position and political situation of witnesses on the certification materials (generally, "reliable" and "for reference only" are not allowed).