President Jacob Zuma's son, Duduzane, should not waste his time writing open letters but rather explain his role in state capture, SaveSA said on Tuesday in defence of Pravin Gordhan.
The movement, made up of civil society, business leaders and other organisations, wrote a tongue-in-cheek letter to Duduzane after his critical and sarcastic letter to former finance minister Pravin Gordhan.
"Zuma Junior (Duduzane) should not be writing open letters at this time -- he should be writing affidavits to explain why he has robbed South Africans of key assets, partnered with a criminal enterprise, and sold our sovereignty," SaveSA said.
"The open letter from Jacob Zuma's favourite son is a bizarre attempt to deflect attention away from the increasing evidence against him and his cronies of their central role in state capture and corruption."
The organisation, which has rallied against state capture, said Duduzane's letter to Gordhan contained a combination of fake news and Bell-Pottinger style innuendos.
"[Duduzane's] letter does nothing but confirm how embedded he is in the state capture project, which has siphoned more than R100,000 billion from the public purse," SaveSA said.
"Rather than explain his role in this, he resorts to intimidation, incitement and hate speech, in a style that is increasingly becoming the trademark of the Zuma family."
In his letter, Duduzane accused Gordhan of "being in bed" with the banking sector and running a campaign against him and the Gupta family.
Duduzane has been widely implicated in a trove of leaked emails from within the Gupta business empire which point to him allegedly brokering relationships between the family and state officials. He also has numerous business interests which have a direct or indirect relation to the Gupta family.