Legal basis

The legal basis for toll payment in Norway is Section 27 of the Norwegian Road Act (Veglova §27) and the Norwegian Regulations relating to the Payment of Road Toll (Forskrift om betaling av bompenger) https://lovdata.no/dokument/NL/lov/1963-06-21-23#KAPITTEL_6

Regarding the time after the trip, there is a 3-year statute of limitations for claims in Norway

https://lovdata.no/dokument/NL/lov/1979-05-18-18/KAPITTEL_1?q=%C2%A7%202.%20(Fristens%20lengde)#KAPITTEL_1

2. (Length of the limitation period) The general limitation period is 3 years