noun
request to remain anonymous; name withheld by request
Used when someone submits a comment, opinion, or letter and asks that their name not be disclosed. Common in newspaper reader columns, public feedback, and formal correspondence.
投書には「匿名希望」と書かれていた。
The letter was marked 'name withheld by request'.
アンケートで匿名希望
In the survey, those who wish to remain anonymous do not need to write their name.