Originally Posted by
mikemey
I believe it was just my passport. I don't remember filling anything out for Germany on the plane.
That's pretty much what I experienced entering Berlin (from an LHR-TXL) flight as a US citizen. Quick glance at my passport, a stamp, and a "Wilkommen".
When I took the Eurostar to Paris from London a few months ago, the French BP agent at St. Pancras was talking on the phone and wasn't even paying attention to passports, he was just turning them to a random page and stamping them. I guess he figured if we're good enough to get into the UK, we're good enough to get into France.