The idea of this mission came to me by accident, but as we know, nothing in this life is accidental. I was on a train from Italy to Lausanne, Switzerland, when after crossing Italian-Swiss border a ticket inspector came to me, asking for the ticket. I showed her my reservation confirmation in my phone. She said that this reservation is not valid and that I should have a paper ticket and that it is written in the conditions of the ticket. I started arguing that she just needs to check my reservation number (PNR) and that it is an electronic ticket and actually conditions claim that I do NOT need to get a paper ticket. Her answer was that it is true for Italian ticket inspectors, but not for Swiss ones, as Swiss system is different. In the end I had to buy another ticket, but I did not have to pay a fine.