Many travelers have been reporting that their credit cards do no work when inserted into automated subway and/or train ticket machines in Italy, as well as other European countries. Travelers in Italy have reported that when they insert their credit card into the ticket machine when prompted, an error message pops up on the screen and a receipt with the message "Transazione Negata, data non valida" is issued.
In Italy, as well as France, a digital chip (EMV) embedded into a credit card is most likely needed to use a ticket kiosk in many cities in Italy, however it's standard practice at most of the kiosk type ticket machines throughout Europe. US based credit cards are slowing starting to introduce these chips in their credit cards by the end of calendar year 2012.
Our site contains over 100 pages of travel safety tips and security tips that are useful for any traveler. You will find tips involving luggage theft, avoiding pickpockets, laptop theft, hotel burglary, and airplane, train, automobile, and boat travel crimes.