Originally Posted by
irishguy28
France, the Netherlands and Denmark are all part of the EU customs union.
You will NOT have to go through "customs"!
Yeh I know, but since the 2015 terror attacks and now with Covid19, I found myself more than often to have to go through some kind of immigration check between two Schengen countries. (I used "customs" as a way to say "immigration" but you're right to point out those are different concepts).