Missive /(?)/

Mis·sive

Missive

a.
  1. Specially sent; intended or prepared to be sent; as, a letter missive.
  2. Missile.

Phrases & Compounds
Letters missive
letters conveying the permission, comand, or advice of a superior authority, as a sovereign. They are addressed and sent to some certain person or persons, and are distinguished from letters patent, which are addressed to the public.

Missive

n.
  1. That which is sent; a writing containing a message.
  2. One who is sent; a messenger. [Obs.]