CityTicket
If the word "+City" appears on your Deutsche Bahn ticket, you can travel to the station in Kassel by public transport on the day you leave or arrive, or continue your journey from the station to your destination. This all applies within the city of Kassel. The return ticket also allows you to travel to the station within the Kassel fare zone on the printed return day. If you have a Bahncard 100, you can use the Bahncard 100 as often as you like in the Kassel fare zone.
DB tickets are excluded from the refund rules of the NVV 5-minute-Guarantee.