I live in Sydney Australia. The reason this effect will not work with Australian bills is the fact that we have transparent/see-through windows on our bills. Without giving away the method, the transparent window is what makes this effect un-usable with Australian bills. Also, Australian bills ALL vary in sizes so it's impossible to 'line up' the transparent windows as they vary too between different denominations.
I'd recommend performing the effect with fake paper currencies that you can easily make up then use for publicity/promotional use. Alternatively you can always just visit the local currency exchange vendor and get some paper currency there.