Unlike some credit cards, your credit score won't be affected by how you spend using your AAdvantage® Debit Card or if you use it to make a withdrawal from an ATM. This is because, AAdvantage® Debit Card is a debit card, just like the ones you might have with your high street current accounts.
Please note, your AAdvantage® Debit Card cannot be used for ATM withdrawals in the UK.