Originally Posted by
tiana
i really doubt they will fingerprint you again....since now your fingerprints are on file.....if they do its going to be that same scan fingerprint thing but it might actually work in your favor since now instead of making you do a song and dance with the million questions they might just put your hand on the scanner and will see that you have a history of going back and forth and actually have never overstayed your stay....
Actually, even though the fingerprint is on file, they can fingerprint you every time you enter.
I have been fingerprinted coming into the US (for trips originating outside NA), where I work. Since the documentation system has been going, I would say 80% of the time they will ask for fingerprints, despite them having my fingerprints on file, through Nexus, as well as another trip a long time ago.
As for going back and forth from Canada --> US, there is no documentation of when you leave, as even if you fill out an I-94, you would not surrender it for transborder travel.