Postage Validity Period: period specified by a postal administration during which a postage stamp may be used for franking |
Valid For Postage: postage stamp that is recognized as franking for a postal shipment |
Invalid Postage: postage stamp that is no longer recognized as franking for a postal shipment |
Valid For Postage In Two Postal Areas: postage stamp that is recognized as franking for postal shipments in two postal areas (e.g. Romania and Yugoslavia) |
Mayfly: philatelic term for postage stamps that were only sold at the post office counter or were valid for postage for one day |
