Cancelled to order
A term describing postmarks that are applied by favour.
A postal official would cancel the stamps in sheets or on cover then return them direct to the dealer, bypassing the normal postal channels.
Technically CTOs are not fakes since they have been cancelled by the stamp issuing authority. Many of these are easily identified because while they have been postmarked they still retain their original gum. Some postal authorities cancel them and sell them at a considerable discount to the philatelic community. The authorities can do that profitably because they no longer need to provide the postal services that the stamps were meant to pay for. Many collectors are more interested in stamps that have been correctly used, and the corresponding used stamp may often be worth more than a mint stamp. Authorities who do this tend to use the same canceller for all CTOs, and apply it very neatly in the corner of four stamps at one time. Main article: Cancelled-to-order
Technically CTOs are not fakes since they have been cancelled by the stamp issuing authority. Many of these are easily identified because while they have been postmarked they still retain their original gum. Some postal authorities cancel them and sell them at a considerable discount to the philatelic community. The authorities can do that profitably because they no longer need to provide the postal services that the stamps were meant to pay for. Many collectors are more interested in stamps that have been correctly used, and the corresponding used stamp may often be worth more than a mint stamp. Authorities who do this tend to use the same canceller for all CTOs, and apply it very neatly in the corner of four stamps at one time.