''Pietersen has been forced to retract claims that disgraced former captain, late Hansie Cronje, was a scapegoat for other corrupt players in South Africa,'' The Austrlian reported.
The report revealed that Pietersen, a former South African, was interviewed by Alan Peacock of the ICC's Anti-Corruption and Security Unit just before the third Test against Australia in Perth, which began on December 14.
It said Pietersen denied any specific knowledge of bribery or corruption in South African cricket, an assurance accepted by Peacock.
''ICC chief executive Malcolm Speed confirmed the outcome of the inquiry in a letter to the England and Wales Cricket Board (ECB), Cricket South Africa (CSA) and relevant player bodies.
''In his letter Speed expressed hope that the formal inquiry would be the end of the matter which began last year when Pietersen made what now appear to be ill-informed comments in GQ magazine in South Africa,'' the report said.
Pietersen had told the magazine that cheating happens in South African cricket and Cronje copped a lot more than he should have.
''I think he took the brunt for the players. There are a lot of people who I think that have done stuff that people don't know about and got away with it,'' Peitersen had said.
This prompted CSA to demand that the ICC investigate the claims and if they were true, to punish the other South African players involved and if not action against Pietersen.
CSA also wrote to the ECB complaining about Pietersen's comments in the same article labelling cricket in South Africa as being racist.
Though Pietersen denied that he made racist remarks, ECB officials were forced to chastise Pietersen for his comments.
In a letter sent to the ICC, CSA and relevant national and international player associations, ECB chief executive David Collier had confirmed that Pietersen had been told to cease commenting on cricket in South Africa.