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A 2006 forensic report on Zuma's finances has reportedly revealed that Mandela gave him R1m to help settle his debts.
The Mail & Guardian reports that according to a KPMG report, Mandela came to Zuma's rescue in June 2005, a few days after he was fired as deputy president and after the National Prosecuting Authority announced it would charge Zuma with corruption.
The report also says that a total of 783 payments were made to Zuma by his corruption-convicted, former financial adviser Schabir Shaik, amounting to more than R4m.
It says Zuma also benefited from several other businessmen.
The report noted that large commercial banks bent over backwards to accommodate Zuma because of his political position, writing off bad debt against his name.