Welcome back to my faithful reader(s?).
As for the rest of you - stop crouching behind the sofa pretending you're out!
After last week's controversies we'll have something a little quieter this week: Yugoslavian Postage Dues On Holiday In Other Countries!
In 1918 the Austrian army, having occupied parts of North Italy, insisted on the use of Austrian stamps. However, since the Lira was 6 centesimi off par with the Krone a straightforward sale of Austrian stamps at face value in Italian prices would have meant that the occupied Italians were getting their post cheaper than Austrians 'back home'. So they surcharged the stamps with as near as they could get to the heller value + 6% (rounded up!). For some reason (presumably availability) they used Bosnian postage dues and express stamps, rather than normal Austrian; Bosnia of course was at this time under Austrian occupation.
Philatelic cover showing the full issue of surcharged postage dues:

At the end of WW1 a quantity of earlier Bosnian postage dues turned up in the Ukrainian town of Stanislavov, presumably taken by the Austrian military in case it was necessary to do the same there as in North Italy. They fell into the hands of the shortlived Republic of Western Ukraine who overprinted them and used them as postals.
Left hand one is genuine; right hand one has a faked overprint, very common at the moment:

Pre WW2 Yugoslavian postage dues used as dues in wartime NDH (Croatia):

Pre WW2 Yugoslavian postage dues used as postals in wartime NDH:
Pre WW2 Yugoslavian postage due used as due in Italian occupied Montenegro:

Pre WW2 Yugoslavian postage dues used as dues in Italian occupied Slovenia:


Yugoslav postage due, prepared but never issued, used as due in German occupied Serbia:

Contemporary Yugoslav postage dues overprinted for use in the military administration zone B of Venezia Giulia:

Contemporary Yugoslav postage dues, including charity tax postal due, overprinted for use in the military administration zone B of Trieste:


