Illinois-chartered First American Bank warned customers not to use their FAB debit cards "or any other cards" in local taxis.

Taxi companies that use Taxi Affiliation Services and Dispatch Taxi to process card transactions were affected, including American United, Checker, Yellow and Blue Diamond and others, according to the bank's website. FAB in the Feb. 28 online statement said it reported the breach to MasterCard and made "repeated attempts" to deal with taxi-payment processors Bank of America and Bank of America Merchant Services to stop processing payments until the breach was resolved. However, Bank of America Merchant Services in an email to BTN said that "at this stage in the investigation, it has not been determined that a data breach on a merchant or any of our systems has occurred." In the meantime, FAB is closing and reissuing compromised cards. FAB did not respond to a request for comment.