Visas & paperwork · Denmark

Hi there, we’re planning our trip to the North Cape this summer. We bought a new vehicle for it. Unfortunately, the registration document is still being processed, and the delay seems long—I don’t think I’ll have it in time for our departure... I have the transfer documents, insurance in my name, and all the supporting paperwork, but not the registration document. So my question is: does the ferry company require the registration document *mandatorily* when boarding in Denmark or not? Thanks for any insights...