Really. How valid is that? If an American tourist uses 20USD to pay for a meal in Montreal or Toronto (which happens a lot), what's the logic that this falls under US jurisdiction.
If it's true, I'd avoid USD like plague
If it's true, I'd avoid USD like plague
https://www.rt.com/business/443354-iran-south-korea-currenci...
Because the USD is the international reserve currency for a lot of countries and the US largely is pretty stable, most countries are fine with cooperating in cases like this with notable exceptions.
FWIW that's changing under Trump (i.e. people are seeing the US as less stable), and the EU is making efforts to increase the use of the Euro as an international reserve currency.