Nomen nescio

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Nomen nescio, abbreviated to N.N., is used to signify an anonymous or non-specific person. From Latin nomen, name, and nescire, not to know, be ignorant of. Together, I do not know the name.

It has become particularly well-known on Internet forums and Usenet newsgroups, where anonymous people often use this name in order to hide their identity.

Another use for the name is to protect against retaliation when reporting a crime or company fraud. In Germany, and Belgium, N.N. is also frequently seen in university course lists, indicating that a course will take place but that the lecturer is not yet known; the abbreviation is sometimes explained as "nomen nominandum" ("the name must be announced") in this case.

"N.N." is commonly used in the scoring of chess games, not only when one participant's name is genuinely unknown but when an untitled player faces a master, as in a simultaneous exhibition.

The generic name Numerius Negidius used in Roman times was chosen partly because it shared initials with this phrase.

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