Originally Posted by
GoAmtrak
Good question... This was a simple r/t, so we originated at CDG. With only carry-ons, I checked in via app and printed BPs at the kiosk, bypassing the counter entirely. Of course we still had to pass through all the usual security.
If you did not go through ICTS at all earlier, this may be a reason that your name was on the list at the gate. Although I think that it is strange that they had you board early instead of just asked questions at the gatehouse.