Originally Posted by
KLouis
Are you 100% certain that it doesn't matter? BCs are nowadays scanned, and it is possible that the last one on the system would not correspond to what is read from the bar code on the penultimate BCs.
Of my many flights by about 15 Star Alliance carriers in the past three years, it hasn't made a difference for me and didn't seem to matter. But that was mostly not involving A3; and it has been a mix of 5 or 6 Star Alliance programs amongst those operators.