Yes, always! Every time you board a bus, trolleybus, or tram, you must scan the QR code to register your trip – this applies to all ticket types (90-minute, 24-hour, 3-day, 5-day, and monthly passes). Registering transfers during your ticket’s validity period is completely free. With a 90-minute ticket, you can finish your last trip to the end of the route even if the 90 minutes expire during the ride.