When I have a train-specific itinerary that experiences a disruption or a missed connection, when is it compulsory to head to a ticket office to have a ticket reissued?
I had two instances where this happened and I handled it differently each time - yet both worked, and it wasn’t clear if I had to get a ticket reissued in either case.
First instance: direct DB ICE train Mannheim-Bern changed to terminate and transfer at Basel SBB due to known engineering works. Our itineraries were all updated prior to departure, but we all miss the connection at Basel SBB. Knowing I have CIV protection for an international ticket, instead of waiting for the next IC6 or IC61, I bypass the service center, hop on the IR26 to Olten that was departing immanently, and discuss with onboard staff without any problems.
Second instance: IR37 direct Basel SBB-Zürich HB with various routes undergoing engineering works changes its final destination to be well short of Zürich about 15 minutes before departure. As I am at Basel SBB with time when the scenario unfolds, I chat with the service desk; they print out a new itinerary (IC6 to Olten, IR35 to Zürich HB) and stamp it. I show it onboard without any problems.