Hello mikejerznoznik
If you buy door-to-door, only an address in Switzerland or Lichtenstein is valid for the billing address. You can also check in your luggage directly at the counter when you arrive in Switzerland and use this service: sbb.ch/luggage
You do not need to book in advance. You can get the service directly at the counter.
If you have any questions, please contact us or the Contact Centre on +41 51 225 78 00.
Have a nice day. Greetings ZoeS