100.000.000 Dinara

The Republika Srpska Krajina was an unrecognized Serb breakaway state carved out of Croatian territory following the 1991–1992 fighting, and its central bank — the Narodna Banka Republike Srpske Krajine — issued currency throughout a hyperinflationary spiral that mirrored, in miniature, the catastrophic monetary collapse simultaneously destroying Yugoslavia's broader economy. By 1993, denomination inflation had become grotesque across the region; a note at 100,000,000 dinara was not exceptional but a mundane transaction instrument.

The RSK ceased to exist in August 1995 when Croatia's Operation Storm overran the territory in under four days, rendering this currency permanently worthless overnight.