Sometimes high-stakes fraud doesn’t have to be high-tech. The former chief financial officer at a company now called Voyager Learning allegedly cooked the company's books by entering figures as white text on white background—the equivalent of invisible ink, Adam Jones notes in a Financial Times blog.
The Securities and Exchange Commission also says Scott Hirth used a "hide" function on a spreadsheet program that kept fictitious entries hidden when printed. The exec settled with the SEC by paying a fine, though he admitted no wrongdoing. (More Microsoft Excel stories.)