Using the Citibank debit card in South America is OK if you can find a Citibank ATM.  However when I was in Peru, Chile and Argentina this was almost impossible.  The gouging banks there charged around A$6 ATM fee per withdrawl and only dispensed a maximum of around A$400 or less per day.  As well many merchants in Peru would not accept Mastercard, only Visa.  Best to carry USD cash when visiting many parts of South America, A$ notes attract a lousy exchange rate or sometimes were not accepted.
	
		
			
		
		
	
				
			
				
						
 
 
 
 
 
 
 
 
 
 
 
 