Buy your ticket to travel through the Munt La Schera Tunnel online.

Tickets bought online can either be printed out or displayed in digital format on mobile devices such as smartphones and tablets. Only specify the arrival date to purchase a ticket. As regards return tickets, travellers will be issued with a return ticket upon arrival at the tunnel when they display the ticket they have already purchased. Said return ticket must be kept safely and can be used at any time for the return journey. It has no expiry date.
Don't forget you must always carry a valid document for travel abroad.