Originally Posted by
stut
Sure, but I was thinking of the Eurostar-style pre-clearance. You used to have special platforms at stations like Geneve-Cornavin, Bale-SNCF, Bratislava Petrzalka, etc. I understand that Bale-SNCF has more or less been reinstated, and of course there were the private pre-checks at Copenhagen Airport a couple of years ago.
I'm not sure what Bale-SNCF actually means, but I took the TER train from Basel SBB platforms 30-35 to Mulhouse on Sunday. The entire west side of Basel SBB is under renovation until 2021, so the French platforms are completely separate from the rest of the station, there was a boarded up small area where passengers could be pulled aside, but perhaps because it was Sunday there were zero checks of any sort.