The system for testing truck drivers in Ontario has been compromised by bribes, forged documents and rigged testing, says a memo leaked to CBC's Marketplace by an industry insider.

Ontario's DriveTest centres are managed by a company called Serco, which oversees operations and logistics for a variety of organizations, ranging from air traffic control for the Canadian Armed Forces to employment services for the federal government.

The leaked internal memo, which was shared with Marketplace following an investigation into driving schools, was addressed to all driving examiners in Ontario. It reveals "a number of employees have either resigned or been terminated this past year due to investigations that we have completed involving allegations of inappropriate and illegal behaviour."

This behaviour ranges from examiners "accepting bribes for issuing road test passes, to manipulation of automatic versus manual transmission certificates, to false driver experience being added to driver records," according to the memo.