He was quick to add that this list is abbreviated, and more information may be available at either of these two sites, if you're interested in pursuing the terminology information. And, as always, if you have questions, feel free to leave a note on the messageboards, and I'll answer whatever I can. An envelope that has been sent through the mail. An envelope with a new stamp and cancellation showing the date the stamp was issued. A design on an envelope describing an event.
Cachets appear on first day of issue, first flight and stamp exhibition covers, etc.
Stamps that honor anniversaries, important people or special events. A single stamp or block of stamps with a margin on all sides bearing some special wording or design. A small sheet of stamps with a commemorative inscription of some sort. A mark put on envelopes or other mailing pieces showing the date and location of the post office where it was mailed. Bogus stamps include labels for nonexistent values added to regularly issued sets, issues for nations without postal systems, etc.