Originally Posted by
eigenvector
You held a confirmed reservation on AC614.
AC denied you boarding on AC614 despite having checked in and presented yourself at the gate on time.
If this happened as a result of overbooking, AC owes you compensation.
The trouble is proving that the flight was overbooked. For example, the people who got your seats might not have originally been confirmed on the flight. They could have been on standby.
If it wasn't overbooked, the OP would have been put on the flight. The fact that there was no space for the OP+1, who held a confirmed reservation, means it was overbooked.
That overbooking may have been created when they processed standby, but that's irrelevant. OP met all requirements outlined in the tariff to qualify for IDB compensation.
If the flight departed with empty seats, then this is a much more egregious issue.