Originally Posted by
yyznomad
What you describe tells me that one can upgrade using someone else's credits in advance, implying that the whole upgrade nominee thing can be circumvented in this regard?
Only on the same PNR and all flights must be the same. There maybe some rules about family only. I have done this many times with my wife. I only do it on lat fares, where you can upgrade at time of booking because the high status pax basically loses the upgrade status.