Only regional train tickets have to be validated. For other trains, etickets can simply be shown to the conductor when asked on the train. Regional train tickets must be validated before departure.
Follow these steps to validate your regional train ticket:
• Use the check-in link provided in your booking confirmation email. Your booking confirmation email will have a subject line of "Your ItaliaRail booking number is…".
• Once the page loads and shows you your ticket, click on the "Check In" button.
• Once the page reloads with your passenger information, click on the "Next" button.
• You will then see a confirmation message saying "Check-in complete. Enjoy your journey." This means you have successfully checked in.