I am just back from a two-month cruise, which started with a few days in Santiago, Chile.
You may not know this, but in Chile, when you use a foreign credit card, you have to select an option on the machine to indicate that you are a foreigner. It has something to do with taxes. If I had known that, and/or my Spanish was any good, I would have chosen the correct option, my card would not have registered that I had tried my pin too many times, and I would not have been locked out. But I did not know that, my Spanish is not very good, and so, just like that, on Day 1 of my vacation, I was no longer able to use my TD First Class Travel Visa Infinite Card, for its intended purpose, being travelling.