Okay, just imagining a scenario here. I have a Citi Platinum Card which gives me Priority one and a free checked bag. I got my better half an award ticket using her miles. AA would not let me use the Platinum card since the AAdvantage account was in her name and the card is in mine and the account and card do not match. Anyway, she does not have a platinum card so she does not get Group One (she got 2) and will have to pay for the bag. However, what happens if I pay for her bag with My Platinum Card. Would that not cause the bag to become free? (I realize that this is purely speculation. She is traveling with me so supposedly she will board with me and the bag is supposed to be free. But because of using two different accounts, it comes up with two different PNRs) I sort of figure during check in her bag will mysteriously become free. But what happens if I pay with my Platinum if they ask???