A spokesperson for G4S said the firm had not been provided with the results of the initial audit of the government electronic monitoring contracts with the government, despite requesting the report.
They said an internal investigation, with external help, found no dishonesty in the tagging contracts.
More top news
Mother of Bobby and Christi Shepherd says Thomas Cook apology was 'too little too late' as she calls for greater safety standards.
The Neverland ranch where pop star Michael Jackson lived until running into financial difficulties has been put up for sale.
A 43rd generation direct descendant of the Prophet Muhammad, the Prince has vowed to clean up Fifa's act.