Originally Posted by
bocastephen
No it is not the customer's seat to trade - the proper process is to notify an agent, request to be rebooked in coach so the next person on the upgrade list can be moved up.
I've witnessed this very thing onboard and have spoken up about it on the spot and was supported by the FA (who said "no") and my seatmate, also on the upgrade list with me.
I disagree. I have passed on twice on an board upgrade when they only had one seat and I have to travel with my disabled wife. but I have also traded my first class seat on occasion. once you have the boarding card it is Your seat and you are free to trade.