Originally Posted by
eternaltransit
Very quick reply to one of your points (will get to the others later) - everyone on a flight has an assigned seat, even if you haven't preselected. An op-up is nothing more than a seat assignment in a higher cabin class - you will either be assigned a remaining seat in the lower class or you will have already been moved to the higher class, a seat in a lower class than booked or you will have been offloaded. The only other situation is if you are on standby, in which case STBY will be your seat assignment.
I follow you.
Nevertheless, the principle of overbooking is that there are more reservations than seats. How the computer handles the seat assignment ?
And, let's say for a 70 seats cabin (at random

), I'm the 71st to check-in.
What seat appears on my BP, knowing that one pax will end up op-uped (but we don't know yet who) ... ? They won't announce me a downgrade as they need to downgrade no-one ... They won't announce me a upgrade neither as it's too early to decide so ...
(It is a calm day today ...)