upright|300px|thumb|A Cancelled-to-order [[plate block of the US newspaper boy stamp of 1952.]]
right|thumb|Cancelled-to-order "stamps" of [[Fujairah, one of the United Arab Emirates, showing unobtrusive placement of cancellations in stamp corners]]
A cancelled to order (also called and abbreviated CTO) postage stamp, philatelic symbol 16px, is a stamp the issuing postal service has cancelled (marked as used), but has not traveled through the post, but instead gets handed back to a stamp collector or dealer. They can come from withdrawn stocks of stamps cancelled in sheets and sold as remainders or from new sheets for sale at reduced rates to the stamp trade.