If you have purchased a digital Railcard in the UK as of 2026, you absolutely must download it to the official Railcard app on your smartphone to use it for travel. Unlike a PDF or a screenshot, a digital Railcard is an interactive, secure item within the app that generates a unique, time-sensitive barcode for ticket inspectors to scan. To set it up, you typically receive a "download code" via email after purchase; you then open the app, select "Add Railcard," and enter that code. It is important to ensure your phone has enough battery life during your journey, as you must be able to show the digital card on demand. If you cannot produce the valid Railcard on your device, you may be issued a fine or required to pay the full-priced fare, even if you technically own a card. Most digital Railcards can be stored on up to two devices simultaneously, allowing for a backup if needed.