When I was sitting in the depature lounge a few days ago I decided to login to my singaporeair.com account and access the booking for the flight I was about to take. Surprisingly, only 20 minutes prior to depature, it was still allowing me to change my seat allocation (I didnt).

My question - If I had changed it, would the automatic ticket checker (pardon my terminology) have picked up on it and prompted the SQ staff to issue me with a new boarding pass?