無む署しょ名めい

noun which may take the genitive case particle 'no', noun

unsigned; unattributed

Describes a document, work, or statement that lacks a signature or named attribution. Often used in formal or journalistic contexts.

• その投とう書しょは無む署しょ名めいだった。

  The letter to the editor was unsigned.

• 無む署しょ名めいの記き事じが新しん聞ぶんに載のった。

  An unattributed article appeared in the newspaper.