Johannesburg - The Organisation Undoing Tax Abuse (OUTA) appears to have uncovered that the Guptas were massively inflating the value of the properties they owned - receiving bonds of nearly R1bn for properties totalling R245m.
In a press statement, OUTA said they were taking action against two of the banks which appear to have supplied the majority of these bonds - the Banks of Baroda and the State Bank of India, for failure to comply with banking laws.
"We have compiled evidence to take action against these banks and handed it to the Registrar of Banks and the Financial Intelligence Centre (FIC)," OUTA chief operating officer Ben Theron said on Thursday.
"We want these authorities to act to ensure that the Bank of Baroda and the Bank of India cease all business with the Guptas, and revoke their licences to trade within South Africa."
In a letter sent to the South African Reserve Bank and the FIC, the civil organisation said the banks had provided many of the Gupta businesses with bonds which far exceeded the value of the properties, and the bonds were often registered years after the purchase date of the properties.
"As an accounting authority, a bank has a duty to satisfactorily and in the best interest of the public carry on the business of a bank and to combat activities which have, or are likely to have, the effect of concealing or disguising the nature, source, location, disposition or movement of the proceeds of unlawful activities or any interest which anyone has in such proceeds i.e money laundering," the letter said.