1, title.
Generally, the main content to be proved is the topic. For example, don't just write "proof materials" or "proof letter" or "proof" about X's bribery, because it will bring inconvenience to the other company to find and use these materials in the future.
2. Look up.
Some certification materials have a clear main delivery unit, and it is necessary to indicate the full name of the main delivery unit above the certification materials; Some general certification materials can also be written without the main delivery unit.
3. Text.
This is the main part of the certification materials, and the true situation of the relevant personnel or events that need to be proved should be clearly written. If it is evidence of investigation, it can also provide relevant investigation clues.
Text:
Zheng Mingxin
Comrade XX, the engineer and technician of our factory, went to Hubei, Guangdong, Hainan and other provinces to inspect and repair the XX brand water heater produced by our factory, hoping that the relevant units would give help.
This is to certify that.
XX factory in xx city, xx province (official seal).
×××× Year×× Month× Day