A FlyerTalk Posting Legend
Join Date: Jul 2002
Location: MCI
Programs: AA Gold 1MM, AS MVP, UA Silver, WN A-List, Marriott LT Titanium, HH Diamond
Posts: 53,006
Sweden: 5 people, 2 rooms, had to show all 5 passports and they were very particular about knowing who was in each room.
Finland: only had to show my passport
Those were both Marriott hotels.
Norway, Denmark: used Airbnbs. Never showed anyone ID.