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I understand that a cash advance could trigger "red flags" but this was only a $100 ATM W/D. I would think that the cardholder would have to fit into a certain "credit profile," ie, high utilization/balances, only making minimum payments, etc before they take AA.
I would definitely contact EO and get an explanation.
I'm going to try going the executive office way and I'll keep you all posted on what happens..