Originally Posted by
JDiver
Be aware the transaction date, not the posting date, is what AA uses when your miles are near expiry.
And any transaction counts - transferring miles, buying miles, gifting miles, any transaction.
True. I would only caveat by saying that if the transaction doesn't post by your mileage expiration date and your miles end up expiring, then you'll need to appeal to AA to have the miles reinstated (for free). In my experience, some partners can take 6+ weeks to post, so this could be an issue/consideration for some who are very close to mileage expiration date. Your expired miles will essentially be in limbo until the partner transaction posts (or you pay for reinstatement, which would not be refundable).
-FlyerBeek