This menu deals with the backs of the postcards (correspondence side generally not illustrated). The back of a card in the absence of other indication makes it possible to date and identify the origin and sometimes the printer of the card. We focus more specifically on the undivided backs (prior to 1906, depending on the country). The divided names often have the mention U.P.U. (Universal Postal Union) and postcard for up to ten languages. In Belgium, postcards often have the bilingual mention Carte Postale - Postkaart.

Information management on the site involves information objects. The main objects of information are postcards, series of cards, publishers, printers. Every object belongs to an information domain. For a user to be able to perform an action on an object, he must be authorized. He can see his authorization on his account