Precancel
A precanceled stamp, or precancel for short, is a postage stamp that has been cancelled before being affixed to mail.
Precanceled stamps are typically used by mass mailers, who can save the postal system time and effort by prearranging to use the precancels, and delivering the stamped mail ready for sorting. Precancels were also used on newspaper wrappers in Canada, Austria and Great Britain. The postal administration will typically offer an incentive in the form of a reduced price for precanceled stamps in volume. Precancels cannot normally be purchased by the general public, although they are often seen in one's daily mail.