I'm sure this has been discussed before but I couldn't find anything doing a search.
My little bro has a bunch of MP miles that expired. United has a challenge whereby if in the first year after expiration you pay $199 and fly r/t they will recredit the miles. The issue is that my brother won't be flying in that period and is not old enough to be MRing. So I was wondering, is it possible when I fly to put in his MP#, he'll get the miles and then subsequently the expired miles as well.
Any input would be appreciated.