In the whirlwind of events at the beginning of World War II, a group of patriots and philatelists from Čakovec decided to produce a provisional issue. They collected all available stamps from local newsstand and overprinted them just before Međimurje was connected to Hungary.
1941 Međimurje, unofficial local provisional issue, complete set in vertical pairs, all from position 3 and 4. Only ten complete sets in pairs with both types are known. Certificate Zrinjšćak.