I took the Helsingør to Helsingborg ferry from the Danish side. I was not warned that there would be passport control on the Swedish side before boarding the ferry and, as such, I did not I know I needed to possess my passport that I had left at the hotel.
Sweden denied me entry and sent me back to Denmark after being requested by the Swedish police to sign some paperwork, presented in Swedish only. There was no passport control on the Danish side, and I was able to return to Denmark.
Later, I took the train from Copenhagen to Malmö, where there were passport checks conducted at the border and I was allowed through to Sweden upon presenting my passport.
I am a citizen of a visa-exempt country, and did not require a visa to enter the Schengen area. As this was intra-Schengen border control, will I be required to declare this on any future immigration form for any jurisdiction as a deportation or removal?