A Bank of America customer in Massachusetts checked his account to discover the bank had made a serious error and deposited $2.45 billion into his account. The customer, Blaise Aguirre, assumed the bank would quickly discover the error, but for almost a week the money remained in Aguirre's account, according to a report in NDTV.

Aguirre finally reached out to his relationship manager at the bank and the error was fixed.

"This was a display error and nothing more than that," Bank of America spokesman Bill Halldin said in the report. "It's been corrected."

This isn't the first customer account mishap for the bank. Recently, a temporary display issue caused online and mobile-banking clients to see inaccurate balances of $0 in their accounts.