Paycheck (2003)

Michael Jennings is a genius who's hired -- and paid handsomely -- by high-tech firms to work on highly sensitive projects, after which his short-term memory is erased so he's incapable of breaching security. But at the end of a three-year job, he's told he isn't getting a paycheck and instead receives a mysterious envelope. In it are clues he must piece together to find out why he wasn't paid … and how he's gotten in hot water.