Warum reserviert TIER zusätzliche Kosten, wenn ihr eine Fahrt startet? Was ist eine Vorautorisierung?

When a trip is started in the hvv switch app, the system reserves a fixed amount, also known as pre-authorization. This is to ensure that there is enough credit on the means of payment to be able to pay for the journey later. As soon as the reservation is confirmed, the amount will be released.