Ok, to all CC or most prob. to their bosses.
If l want to fly a - b but not b-a back, instead of throwing my return half of the ticket away i give it to a friend who wants to fly b-a.
Now we both have passports to show at check-in but the return ticket is in my name, they cant fly.........But surely a bum on the seat is a bum on the seat, does it really matter who's.
Now is this for a security reason or (more likely) a profit reason