A recent article tells an interesting story. Remember the "Bank error in your favor" card in Monopoly? Here's the extreme reverse.
A man in New Hampshire bought a pack of cigarettes. Now we all know that cigarette prices have risen at quite a clip over the past decade, but this guy was pretty surprised when he checked his checking account balance and discovered that he had been charged over $23 quadrillion ($23,148,855,308,184,500).
What I found amusing was that it took over two hours for him to resolve the dispute with his bank and have his $15 overdraft fee repealed.
In classic fashion, the bank referred all reports' questions to Visa, and Visa referred all queries to the bank.