Just ran out of cash on my last day in Buenos Aires, Argentina so I decided not to withdraw money from an ATM and pay with my credit card for anything I needed the last day. I went to the airport (EZE) and thought that I could pay the airport tax with my Mastercard. To my surprise, the airport (Argentina 2000) only takes Visa and American Express and I only had my MasterCard in my pocket... Next time I will take my Visa also!!