Analysis: Shu Fei had the meaning of anonymous letter in ancient times. There was a "flying book" in China in the Han Dynasty, and people in the Tang Dynasty commented that "flying books have no roots, and if they fly, they will become anonymous books today". Writing without signature is to prevent retaliation. However, in the era when the rule of law is not emphasized, flying books often become a tool to frame others and attack opponents.
For example:
If you have a book, don't send it, burn it when you see it; Buy two male and female servants if you can catch them, and it's up to the bookseller to judge. The so-called people, when they see books thrown, are not allowed to burn books and do not send them; Investors [get] books don't burn, which is also called "easy".
Here, the "contribution book" is marked as an anonymous letter by the organizer. Accordingly, the government should burn the anonymous letter immediately after receiving it, and do not open it; If the author is caught, the letter doesn't need to be burned, so that the author can be interrogated.
Sending an anonymous letter to inform people that there is a defendant but no plaintiff can neither guarantee the equal litigation rights of the plaintiff and the defendant, nor impose corresponding obligations on them. It is a violation of the normal litigation system and legal order, and its legal effect should naturally be denied.