My name is Hüsnü Dabak, I purchased Travel ticket about 31/3/2026-04/04/2026 calender date. And I received tickets( also my wife’s Sevil Dabak) via mail. I wan to register the tickets in SBB app. But I could not do it. The hard copy ticket print out is anough to use? In order to define the travel tickets, I need a customer number which is not on the ticket… thanks a lot for your support.