In publishing, a correspondence piece is a specific article type used for rapid communication or critique.

: Usually includes a limited number of references (often 10 or fewer) and only one or two display items like a table or figure.

: Typically very short, ranging from 250 to 1,000 words depending on the journal.

A "correspondence piece" most commonly refers to a or a formal letter to an editor in academic and scientific journals . Academic & Scientific Context