My wife and I traveled to San Juan a few years ago to celebrate our 20th wedding anniversary. I used a couple of different cards for our expenses, but I put all of our meals on my Capital One card. I always hate handing my credit card to a waiter or waitress, watching them walk off with it to some back room somewhere.
Anyway, shortly after returning home, I got a call from a very nice lady at Capital One. At first I was suspicious, but she convinced me that she was legit. She told me about a couple of recent attempts to use my card and asked me to confirm or deny the charges. They were from somewhere in California, and were incidents where someone actually tried to use a card with my credit card numbers on it to try and purchase some very expensive items. I confirmed what she already knew, that I live in Pennsylvania. I assured her that I had not traveled to California any time recently and could not have made those purchases.
These crooks are very intelligent and very resourceful. In a matter of days, they had sent my information from PR to CA, created a new card and gone shopping with it. Fortunately, something in Capital One's system raised a red flag and the purchases were denied. One of the purchases did go through, she assured me that I was not liable for those charges. Whether they caught the culprits or not, I don't know. She told me to destroy my card and a new one arrived a few days later.
Kudos to Capital One for being on the ball.