Revenue stamps were once widely collected by
philatelists and given the same status as
postage stamps in
stamp catalogues and at exhibitions. After World War One, however, they declined in popularity, possibly due to being excluded from catalogues as the number of postage stamps issued rose rapidly and crowded revenues out. The lowest point in revenue philately was during the middle years of the twentieth century. A
Stanley Gibbons children's stamp album from the 1950s warned in its introduction: "Since Philately is the collecting of stamps that are employed in connection with the Posts, do not put in your album fiscals, telegraph stamps, tobacco-tax labels and other such strange things as are often found in some collections." This is not a definition of
philately that would be recognized today. More recently, revenue philately has become popular again and now has its own FIP (
Fédération Internationale de Philatélie) Commission and is an approved category in FIP endorsed
stamp exhibitions. Many catalogues have been issued by specialist publishers and dealers but revenue stamps still do not feature in some of the most popular catalogues, for instance by Stanley Gibbons and
Michel, unless they are
revenue and postage stamps. However, both the standard
Scott and the Scott Specialised United States catalogue feature US revenue stamps. The leading catalogue for revenue stamps of the United Kingdom, the British Commonwealth and several European countries is the Barefoot Catalogue. == Some types of revenue stamps ==