Originally Posted by
bullrush
I didn't use my American Express Business Platinum card to book my flight. Can I still get a free checked bag by just showing them the card at check-in?
If you mean the "regular Business Platinum charge card", there is no baggage benefit.
But you can PAY for the bag, which will be deducted from your $200 a year benefit, if you've selected Delta Air Lines as your airline of choice.