When you think of identity theft, you probably think of stolen wallets or bank statements missing from your mailbox. With personal information stored in file cabinets and lying on desktops and fax machines, however, the workplace provides an even greater goldmine for identity thieves. In many companies, people also regularly leave purses, bags and wallets in unlocked office areas, making it easy for dishonest co-workers and strangers to steal check books, driver's licenses, and other personal information.