Originally Posted by
Mwenenzi
AA take a dim view on cherry picking status benefits and changing FFN. AS may have the same policy.
From
Change FFN / frequent flyer number on AA booking? (master thread)
Earning AAdvantage Miles
"You cannot accrue partner airline miles with your partner frequent flyer number if you have already used your AAdvantage number to obtain AAdvantage program benefits such as First or Business Class upgrades, baggage fee waivers or complimentary access to Preferred/Main Cabin Extra seats. Additionally, you cannot redeem partner airline miles with your partner frequent flyer number and obtain AAdvantage program benefits such as priority boarding and access to preferred seats."
Wow. That first one I totally get, agree with, and follow myself even if it's not the official rule. The second is a bit absurd. So if I use my own (say) BA miles to purchase an AA ticket and I have AA elite status, I can't use my AA elite benefits? But if my partner used their BA miles to purchase an AA ticket, presumably I could? That doesn't make any sense.