A generally accepted definition of postal stationery can be stated as follows:
Postal stationery comprises postal matter which either bears an officially authorized pre-printed stamp or device or inscription indicating that a specific rate of postage or related service has been prepaid.
Postal stationery can be classified and collected in various ways with a country or a group of countries. Examples are:
Postal stationery can be an interesting addition to a thematic collection.
Postal stationery also can enhance a postal history collection.