When you travel it is your responsibility to make sure you have a valid ticket for the whole trip. If not, you will have to pay a fee during a ticket control. If you have forgotten you ticket at home, you have to buy a new ticket for the trip. This also applies if you have a subscription or a registered travelcard.
With Ruter in Oslo and Akershus
Impersonal tickets
All Ruter’s tickets are impersonal. This means that you may loan other people your ticket when you don’t use it yourself. For the same reason, you can therefore not show a valid ticket later.
Fee during a ticket control
Without a valid ticket you will have to pay a fee during a ticket control at the following rates: NOK 750 if you pay immediately, NOK 900 if you are invoiced, and NOK 1500 if your ticket has been forged.
If the validator or ticket machine does not work
If the validator/ticket machine is broken and there is no point of sale close by, you may travel as usual, but you risk having to pay a fee if there is a ticket control. At a ticket control, the ticket collectors in most cases will be able to check the status on the validator/ticket machine. If, on the other hand, you have to pay a fee due to faulty equipment, you can use the contact form (se below), and the fee will be waived when the error has been confirmed.
Complaints
All complaints must be addressed in writing via ruter.no [go to contact form] or by mail to "Ruters kundesenter, Postboks 1030 Sentrum, 0104 OSLO". Complaints are not processed during personal visits.
Complaints
Requests concerning fees for lack of ticket or invalid ticket should be sent to NSB either by mail or by e-mail. Remember to state your name, address and invoice number. Assumed processing time is one to two weeks.
E-mail: 
By letter: NSB Øst Togkontroll og kundeveiledning, Kontroll, 0048 OSLO. Marked: "Complaint concerning fee".
If you want to complain about ticket control outside the area covered by Ruter and NSB, you have to contact the company with which you travelled. You will find contact information on the ticket control fee.
