When the German Army occupied Međimurje, they halted all postal traffic until the Hungarians assumed control on April 21, 1941. Despite this, approximately twenty letters franked with the Međimurje Issue have been recorded. These letters were processed through regular postal channels and successfully delivered to their addressees. Since all post offices in Čakovec and the entire Međimurje region were closed then, the mail was dispatched from the nearby city of Varaždin.
Two covers bear Međimurje stamps cancelled with Čakovec postmarks on April 12, 1941. After the closure of the Čakovec post office, its cancellers fell into private hands. Consequently, any items bearing these postmarks with dates after April 7, 1941, are considered cancelled to order or fraudulent.
