Originally Posted by
psychokilla
2 boarding passes, both were marked BA, but the ORK-LHR was a codeshare flown by Aer Lingus. It just seemed odd, and like I said, when the beep occurred, I thought it was op-up, to go from there to 'uh, the computer says no' was a bit disappointing
That's likely why. I don't have experience with BA/Aer Lingus, but I fly UA/LH a fair amount, usually beginning with UA at ORD, and LH always wants to reprint my boarding pass before boarding my continuing flight. Now I just proactively go to the GA to have it reprinted. I'm not 100% sure that getting your BP from another airlines means that it actually checked you in on the other airline's system.