Philatelic cover
An envelope, postal card or other item franked and mailed by a stamp collector to create a collectible object. It may or may not have carried a personal or business message. A nonphilatelic cover is usually one that has carried business or personal correspondence and has had its stamps applied by a noncollector. Some stamps are known only on collector-created covers. It is impossible to say whether some covers are philatelically inspired or not.