I have no idea if "bøssebærer" exist in english, but the closest I can think of is charity collector. If it makes any sense?
Anyway, every year, the Russ in my town collect money for charity as an important and meaningful tradition. We are about 150 Russ in my year, and I think about 80-100 people collected money. This year we collected money for the Norwegian Cancer Society(*). Me and my friend went to about 40 houses, just about every person we met gave money. I think cancer is something most people can relate to and have history with in one way or another.
I am proud to say that we collected about 126 000kr, which is a lot :-)
(*) The Norwegian Cancer Society- In Norwegian; "kreftforeningen". It is a nationwide organisation that addresses the challenges of cancer and funds some of the research the doctors/scientists are working on.