Cancellation
Also: cancel, CDS, obliteration
Cancellation is a mark applied to a stamp by a postal service or collector to prevent it from being reused.
Glossary Term
A used stamp has been cancelled after carrying mail through the postal system, typically showing a postmark or other cancellation.
Also known as: postally used, fine used, FU, cancelled
A used stamp is one that has done its job: it paid for postage and was then cancelled by the post office to prevent reuse. Used stamps normally show a postmark or other cancelling mark and have usually lost their gum when soaked off the envelope.
Used stamp value depends heavily on the cancellation:
Used stamps can be collected off paper (soaked and cleaned), on piece (still attached to part of the envelope), or on cover (on the complete envelope). On-cover examples show how the stamp was used and are the most informative for postal history.
Used and mint values are listed separately in catalogues. For modern stamps, high-value used copies can be scarce because few were needed for ordinary mail. Collectors of used stamps often find kiloware a rich and inexpensive source of material.
Fine used (FU) is a British term for a used stamp with a light, clean cancellation that leaves the design clear, and no faults. It is the preferred standard for used collections in the UK.
Not necessarily. For many modern stamps, especially high values, genuinely used copies are harder to find than mint and can be worth more. For many classic issues, mint copies are scarcer. It depends on the stamp.
Postally used means the stamp actually paid for mail carried through the post, as opposed to being cancelled to order or favour cancelled. Postally used copies are generally preferred by collectors.
Also: cancel, CDS, obliteration
Cancellation is a mark applied to a stamp by a postal service or collector to prevent it from being reused.
Also: CTO, canceled to order, remainder cancel
Cancelled to order (CTO) stamps are stamps cancelled by a postal authority without ever being used on mail, usually in bulk for sale to collectors below face value.
Also: postal cancellation, date stamp
A postmark is an official cancellation mark applied by a postal service to indicate that a stamp has been used.