OFA - Oslomarka's Fishing Administration is an organization that works with fishing in Oslomarka. They offer the sale of fishing licenses for different seasons, which give fishermen the opportunity to fish in specific areas. The organization also informs about the current rules for fishing in the Oslomarka, as well as about the ban on sport fishing in the Oslo Fjord.
In addition to selling fishing licenses, OFA publishes fresh stories related to fishing and organizes annual meetings and season openings for fishermen. To improve the fishing experience, they perform water calcification and they focus on sustainable fishing practices. The organization offers both individual and family fishing licenses, which makes it easier for different groups to participate in fishing activities.