The Duellplakatet (English; Duel Placard) was a document issued in 1662 that explicitly banned duels in Sweden.
Anyone who dared to duel despite the ban could be fined or expelled, and anyone who died in a duel was not allowed to "have any Christian and honorable burial ceremonies in our dear Fatherland, but to be laid in the ground as a criminal and a wrongdoer". [1]
The ban was repeated in new ordinances in 1682 and 1738.