Stuck on a Crossword Puzzle? Crack the Code with This Subject Line Abbreviation!

Stuck on a Crossword Puzzle? Crack the Code with This Subject Line Abbreviation! - ATTN
Subject line abbr.

Prefix meaning “to the attention of

Letters atop a business memo (header)

Parts of a letter indicating recipient (address block)

Letters indicating a specific recipient (addressee)

Memos may have one at the beginning (subject line)

A way to direct mail (mailing address)

Emails may have one specifying the recipient (recipient field)

ATTN