At that time, a mail with advice of receipt (AR) was not on the list of the available post office services, and therefore has not been used. The only known exception was shown at the Croatica 2015 exhibition as a part of the Greatest Rarities of Croatian Philately display.
1945 Split local provisional issue, registered letter with advice of receipt (marked with hand as "Povratnica"), properly franked with 60kn (20kn for letter, 30kn for registration and 10kn for the advice of receipt), sent from Dubrovnik (2.VI.45) to Osijek. The only known AR letter using stamps of Split provisional issue.
