If you are fishing in saltwater you have to purchase a fishing license, which differs from the one you have to get to fish in lakes and streams.
All anglers between the ages of 18-65 must have a valid fishing license to be allowed to fish in Danish waters. Children and pensioners can fish without the fishing license, the only exception for the licenses are the put&take lakes you will find around the region.
You need to buy the license before you start fishing and the license needs to be valid in the period you are fishing. The fishery inspection periodically takes samples and if your fishing license is not correct you get a fine. The money spent on the license is used to maintain the fish stock.
You can buy your fishing license at www. fisketegn.com
If you open the page with your mobile phone, you will also get an overview if there are protected areas near you or not. Indeed, you have to turn on your GPS for it.
Apart from the fishing license you also have to buy a day license for most of the streams. The day license can be bought at www.danskfiskekort.com, as well as in local kiosks, camping sites, and tourist offices. A day license costs about 60-150 DKK and a week license 125-350 DKK.