The Turkish authorities have arrested six people for allegedly minting these Islamist State's coins:http://news.yahoo.com/turkey-arrests-six-over-minting-coins-155140896.htmlActually, in the areas controlled by both ISIS and the Kurdish YPG the currencies that circulate are the Syrian pound and the American dollar, though ISIS are trying to stop some Syrian notes being used in some parts of the area they control (in this case about to lose):http://www.syriahr.com/en/2015/10/islamic-state-prevents-the-circulation-of-2-categories-of-the-syrian-currency/("Nusayri" is the derogatory term that Sunni extremists use to describe members of the Alawite sect of islam)ISIS are said to pay their foreign fighters in dollars.