My peave has been that I call my banks before I take an international trip, to tell them where I will be going and using the cards. Then I get to Europe or Asia, and use the cards. Most of them are no trouble, but Bank of America calls my HOME number to let me know that my credit card is being used in whatever unusual country.

Never mind that I called to let them know in advance, and never mind that is in the record, and never mind that it is also in the record that I have a cellular phone, but they call my home number and leave a message there, and when I have not called them back within 24 hours, they block my credit card! This has happened more than once. AMAZING!