The train manager will check your ticket en route, so please make sure you have it to hand. If you're travelling on a special fare, you'll need to show any relevant documents. Your ticket is only valid on the train you've booked.

Tickets on the Eurostar are checked multiple times throughout the boarding process, making it virtually impossible to board without a valid fare. The first check occurs at the automated ticket gates (or manual check-in desks) where you must scan your physical or digital barcode to enter the security and passport control area. This "pre-boarding" scan validates that you have a booking for that specific departure. Unlike standard domestic trains in Europe, you cannot even enter the platform without this initial ticket verification. Once you have cleared French/British border controls and reached the departure lounge, your ticket may be checked again by staff during the final boarding call. Furthermore, once the train is in motion, Eurostar Train Managers frequently perform onboard ticket inspections to ensure every passenger is in their correctly assigned seat and coach. Because Eurostar operates as a high-security international service involving the Channel Tunnel, the ticketing process is much more akin to an airline's "gate-to-seat" verification than a traditional rail service. If you are found without a valid ticket onboard, you face significant fines and may be removed at the next station.