Security firms G4S and Serco have been accused of overcharging the government tens of millions of pounds for electronic tagging services.
The Olympics fiasco could hurt G4S' role in the public sector in the UK, making them a less tempting choice for government or councils.
Security company G4S has admitted the failure to fulfil its Olympics contract cost it in the region of £50 million.
Taxpayers will get "a refund" on the £24 million G4S wrongly charged the Government for monitoring offenders, according to the Ministry of Justice (MoJ).
An MoJ spokesman said it was still working with the firms and the independent auditors to work out "what the final sum will be".
The head of G4S is due to appear in front of MPs at the public accounts committee later today:
– Ministry of Justice Spokesman
The Secretary of State has been clear: we are determined to secure a refund for the taxpayer.We have taken appropriate legal advice and will pursue all possible avenues. This matter is now the subject of a criminal investigation.
We are not able to comment further at the current time. We will make a further statement when it is appropriate to do so.
A private security firm raked in almost £16,000 for a monitoring system that was not even installed, accountants found.
A £2 million audit into the private security firms the Government uses found:
- Serco charged and received £15,500 for an uninstalled monitoring unit for nearly five years.
- G4S netted nearly £4,700 over a three year period for a botched monitoring job.
- Serco billed the MoJ on four separate occasions for the same tag as the offender was under multiple supervision orders.
- There was no evidence G4S had overcharged on any other public service contracts.
MPs are preparing to grill the group chief executive of G4S over the £24 million they admitted overcharging the Ministry of Justice (MoJ) for electronic monitoring of offenders.
G4S and fellow contractor Serco are the subject of a criminal investigation by the Serious Fraud Office (SFO) over the way they operated the contracts.
The Government rejected the private security firm's offer to repay the £24 million yesterday as officials vowed to "pursue all possible avenues" to recoup taxpayer cash.
G4S chief Ashley Almanza said the offer was "an important step in setting this matter straight" and restoring trust.
The Government has rejected an offer from security firm G4S to repay the £24m it owes for overcharging in credit notes.
Officials turned down the settlement and say they will "pursue all possible avenues" to recoup more taxpayers' money.
A Ministry of Justice spokesman said it was still working with the firms and the independent auditors to work out "what the final sum will be".
"The Secretary of State has been clear: we are determined to secure a refund for the taxpayer.
"We have taken appropriate legal advice and will pursue all possible avenues."
Security firm G4S has apologised for overcharging the Government for its provision of electronic tagging services, calling its actions "unacceptable".
The group's chief executive Ashley Almanza said:
The way in which this contract was managed was not consistent with our values or our approach to dealing with customers.
Simply put, it was unacceptable and we have apologised to the Ministry of Justice.
We remain committed to working with the Ministry and the UK Government to resolve this matter and to provide enhanced oversight of service delivery and contract performance.
G4S said it will give credit notes worth £24.1 million to the Government after an independent review found the security firm had overcharged for its electronic tagging contracts.
The firm said the review of the contract showed that its justice division had "wrongly considered itself to be contractually entitled" to bill the Government, but stressed there was no evidence of dishonesty or criminal conduct.
Electronic tagging contracts run by G4S and rival firm Serco are currently under a criminal investigation by the Serious Fraud Office.
G4S has admitted it wrongly billed the Government for the provision of electronic monitoring, or tagging, services, and said it will pay back £24.1 million.
A criminal investigation has been opened into government electronic tagging contracts held with Serco, as well as G4S, the Serious Fraud Office (SFO) said.
An audit by accountancy firm PricewaterhouseCoopers, launched in May, alleged that overcharging began at least as far back as the start of the current contracts in 2005 but could have dated back to 1999.
Justice Secretary Chris Grayling told the two firms that an independent forensic audit was required to look at internal email trails between executives to establish what happened. While Serco agreed to take part, G4S refused.
Serco allowed a further forensic audit to take place but G4S refused to co-operate and were reported to the SFO.
A criminal investigation has been launched into a contract between security firm G4S and the Government for tagging criminals.
An inquiry has been opened by the Serious Fraud Office after it emerged G4S, along with Serco, had charged the Ministry of Justice for monitoring offenders who were dead, back in prison, had their tags removed, left the country or never been tagged in the first place.
An audit by accountancy firm PricewaterhouseCoopers, launched in May, alleged that overcharging began at least as far back as the start of the current contracts in 2005.
The Government reported G4S in July when the FTSE 100 firm refused to take part in an additional audit to rule out any dishonesty.
The Serious Fraud Office (SFO) has opened an investigation into the Government's contract with G4S for the provision of electronic monitoring, or tagging, services, the security firm has confirmed.