Source: Flickr / Marcin Wichary.

With credit and debit card fraud and security breaches running rampant these days, a bizarre case of possible card fraud has emerged in the Windy City, involving a cast of players including Bank of America Corp. (NYSE:BAC), MasterCard (NYSE:MA) , Illinois-based First American Bank – and a host of Chicago taxi cab companies.

A pattern of card fraud and customer complaints
First American first smelled a rat on February 10, after receiving 11 complaints from checking account customers saying that they had experienced fraudulent charges on their debit cards. The bank traced the activity, which showed the source to be various taxi cab companies in the Chicago area.

The bank notified Bank of America, the processor for the taxi cabs, and MasterCard, asking them to stop processing such transactions, but problems continued. On February 28, First American filed a complaint with the city of Chicago, describing the problems with debit card use in city taxis. The fraud has been ongoing, the bank believes, since early last December.

With questionable charges adding up – First American noted a total of at least $62,000 by late February – and no action by either B of A or MasterCard, First American decided to go public earlier this month. It posted a security notice on its website, advising its customers to refrain from using their cards to pay for taxi fare. The bank noted that the problem continues, despite the bank's having notified both MasterCard and Bank of America of the problem, and beseeching them to take action.

No comment?
MasterCard and B of A have indicated that they are performing their own investigations, and refuse to comment further. Bank of America has denied that it is dragging its feet, and a spokesperson from MasterCard has expressed sympathy with First American's frustration. Still, from both companies, silence prevails.

Security issues are top of mind for credit card companies, to be sure. On March 7, MasterCard and rival Visa (NYSE:V) made a joint announcement, introducing the creation of a group that will focus on increasing payment security for "consumers, retailers and financial institutions". One of the priorities will be pushing for the adoption of EMV chip cards, the brainchild of Europay, MasterCard, and Visa, which are less prone to fraud, unlike the current magnetic stripe now in use.

Meantime, the mystery surrounding the debit card fraud that appears to be limited to taxi companies and First American continues – as does the lack of response from B of A and MasterCard. For card users, taxi cab rides have just been added to the growing list of places consumers use their debit cards at their peril.

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.