Deltager AS delivers an online registration and payment solutions on behalf ourselves and clients - such as Deltager.no, Participant.no, Oslo Hundeskole, Norwegian Athelete Federation (through mosjon.friidrett.no) and Norwegian Swimming Federation (through Tryggivann.no).
So these transactionas are usually associated with the registration of an event, course, conference or a membership fee.
If you cannot remember what the payment was for, please perform a search here.