Originally Posted by
gglave
I'm not aware of any other country other than the USA that has true pre-clearance on foreign soil, however one might argue Europe has a version of this. When I flew YUL -> GVA -> BCN I cleared "European Immigration" at Geneva and did not do so again in Barcelona (I didn't leave GVA). So in effect I had cleared immigration for Spain before flying onto their soil.
I cleared customs in Spain.
Doesn't the UK also have this at Paris (Eurostar terminal)?