I'll continue to take it a little more offtopic.
Uruguay is still a good place for financials especially compared to Argentina but they recently got strongarmed by the OECD in particular into tax info sharing agreements amongst other stuff. They share tax info with other countries now. The other one is if the USA wants to investigate terrorism and also for general crimes.
There's still more privacy than many places but it's really not that great any more.
It doesn't really effect criminals - they use companies and hide behind them. It really just effects the ordinary people who can't afford company incorporation fees like expats from countries with a global tax policy who try to tax things like your Argentine income.
Because of this it can be very hard for US citizens to get a bank account in Uruguay. Most uruguayan banks just don't want the hassle of uncle sam.
There should be more info on Uruguay account here. I looked into it as a way to avoid all the hassle needed for an Argentine account but it was hard to get the details. I found the BROU bank seemed very cheap but that made me suspicious and I don't know where their investments are, or how well capitalised as to how well protected they are from economic problems.
The other thing about BROU is that they are the national bank so info sharing is a lot quicker, not a good one if you want some privacy.
Anyone know anything about merchant accounts either?
Regards the original question,
be aware that many places are fussy about the condition of the notes. You might need to give them an iron!