The folder has precut tabs (5) which are folded towards the interior of the leaf (3) of the folder (1) along a fold line (6) coinciding with the extreme edge of the folder and parallel to the spine (7). It has an overfold line (8) parallel to the preceding fold line and at a distance from the latter equal to the height to which the tab extends from the folder when it is in an erect identification position. The tab extends towards the interior of the folder beyond the line (8) and carries on its external face an indicium of the same type and same range as that printed on the exterior face of the folder.
