Originally Posted by Stranger

Some years back, on my way to a meeting near Pisa, I had bought a non-refundable train ticket from Milano Centrale. There was a huge line at passport control. No time to buy a ticket to the airport train. I barely made it to the last train that would let me connect to my booked train at Milano Centrale, thinking I would need to buy on board or whatever. In the end the conductor never showed up and I never paid.