circular letter; circulating document
A letter or document passed around a group for everyone to read, often with each person adding a comment or signature before passing it on. Not to be confused with 回文 (かいぶん, palindrome).
See also: 回文 (かいぶん)
The neighborhood association's circular letter came around.
I signed the circulating document and passed it to the next person.
Compound of 回し (mawashi, 'circulating', from 回す mawasu 'to send around') + 文 (bumi, 'letter, document'). The reading ぶみ is a rendaku form of ふみ.