You can have a weekly/monthly/whatever ticket that lets you ride any train inside the area of validity. The seat reservation system doesn’t have a way to ‘check’ those types of tickets.
You can also book a ‘rail and fly’ ticket on DB that lets you take the ICE /anywhere/ in Germany 24h before/after your international flight, but doesn’t check your airline ticket because it can’t - you need to show the ticket inspector your confirmed booking (paper or phone) when they check your ticket.
If you don’t have a valid booking to show, they will charge you a full fare ticket, or call the cops to remove you and fine you.
You can have a weekly/monthly/whatever ticket that lets you ride any train inside the area of validity. The seat reservation system doesn’t have a way to ‘check’ those types of tickets.
You can also book a ‘rail and fly’ ticket on DB that lets you take the ICE /anywhere/ in Germany 24h before/after your international flight, but doesn’t check your airline ticket because it can’t - you need to show the ticket inspector your confirmed booking (paper or phone) when they check your ticket.
If you don’t have a valid booking to show, they will charge you a full fare ticket, or call the cops to remove you and fine you.