Campione d'Italia is an Italian village on Lake Lugano that is entirely surrounded by Swiss territory. In 1944, its unusual geography combined with the wartime situation to cause Italian postal service for Campione to be suspended. In cooperation with the Swiss PTT, stamps were prepared and issued denominated in Swiss francs that were valid for postage within Campione and to Switzerland. Because Campione d'Italia was not recognized by the UPU, overseas mail had to be franked with Swiss stamps.
Because of the small population of Campione and the limited demand for wartime correspondence with Switzerland, most covers represent philatelic usages.