ANC spokesperson Smuts Ngonyama told the South African Press Association (Sapa) that the ANC had not seen the documentary. The party was reacting to media reports about the film, he said.
Earlier in the day, the producers denied being the source of the suggestion of a link between Mbeki and Hani's murder.
Broad Daylight Films said the film merely reported that fact that there had been a formal investigation into an alleged plot against Mbeki in 2001.
"The alleged plotters, [senior ANC figures] Tokyo Sexwale, Mathews Phosa and Cyril Ramaphosa were said to have spread a rumour linking Mbeki to the Hani assassination."
The suggestion about a link did not come from Broad Daylight Films, the producers said.
"In fact, film maker Redi Direko appears in the film debunking the rumour, saying: 'I don't believe it'," said the producers.
They added: "Two other commentators in the film state that the whole thing was unbelievable and was merely a sign of paranoia."