How do I prove I have a valid train ticket for segments that don't require a seat reservation? I bought a 5-day eurail italy pass last year when it was on sale and it turns out that 1 day I will be taking a few trips which don't require a seat reservation. For the segments that do require a reservation, I can print out a ticket with a barcode. For the other trips, I have added each one into the railbooker app attached to my eurail pass. If I get asked for a ticket, do I just need to show the railbooker app?