Flávio Bolsonaro, Brazil’s leading rightwing presidential hopeful, has been caught on tape asking a banker accused of corruption for $26.8m (£20m) to fund a film about his father, the former president Jair Bolsonaro.

The leaked voice memos and text messages were published on Wednesday by the Intercept Brasil, and later acknowledged by Flávio Bolsonaro, a far-right senator who is tied in polls with President Luiz Inácio Lula da Silva ahead of October’s election.

The incident was already being seen as the most serious blow since the senator announced his candidacy as his father’s representative, since the former president is under house arrest after being convicted over an attempted coup.

In the recordings, Flávio Bolsonaro can be heard asking for R$134m ($26.8m) towards a “heroic” biopic in which Jair Bolsonaro is played by Jim Caviezel, who portrayed Jesus in Mel Gibson’s 2004 Passion of the Christ.

The requests were made to the banker Daniel Vorcaro, who is currently in prison and at the centre of what many consider the country’s largest banking fraud and one of the biggest corruption scandals in recent history, with total losses estimated at R$60bn.

In the messages, which were sent before his arrest – but when many of the accusations against him were already widely known – Flávio refers to the banker as “brother” and presses him for payment to ensure Caviezel and director Cyrus Nowrasteh were paid.

“We’re at a very decisive moment for the film and, as there are a lot of outstanding payments, everyone is tense … Imagine us defaulting on someone like Jim Caviezel, or Cyrus … It would be very bad,” the younger Bolsonaro can be heard saying.

The revelations triggered a significant backlash, even among the far right.

Romeu Zema, the governor of Minas Gerais who is a presidential hopeful but has largely avoided criticising the Bolsonaros, called the recordings “a slap in the face to decent Brazilians”, while a conservative congressman suggested it might be better to replace Flávio on the ticket with Bolsonaro’s wife, Michelle.

“The blow to Flávio’s campaign is brutal – by far the worst news for his campaign so far,” said the sociologist Celso Rocha de Barros.

“Flávio’s anti-establishment credentials, which helped him draw level with Lula, could quickly erode,” added Barros.

Vorcaro was the majority shareholder in the small private Master Bank, and is accused of defrauding many of its 800,000 clients out of hundreds of millions of pounds by offering returns far above market rates. To cover losses and keep expanding, he allegedly paid millions in bribes to public officials and politicians.

Vorcaro denies all the allegations and is awaiting trial in prison.

The scandal has rattled Brazilian society from football, religion, politics and the judiciary – and first touched the Bolsonaro family last week, when police accused senator Ciro Nogueira, a former senior member of the ex-president’s cabinet, of having received monthly bribes of up to R$500,000 to act in the banker’s interests. Nogueira denies the allegations.

When Flávio’s messages to Vorcaro were revealed on Wednesday, he initially denied the story, but later admitted it, saying it was “a son seeking private sponsorship for a private film about his father’s story”.

In the messages, he invites Vorcaro to a private dinner with Caviezel and Nowrasteh in São Paulo, and the banker responds by suggesting it be held at his home. Caviezel and Nowrasteh are not accused of wrongdoing; neither man responded to a request for comment.

Bolsonaro did not respond to requests for comment and, in his social media post, did not say whether he ultimately received the money. However, an advertising executive reportedly hired to broker the deal told the newspaper O Globo that at least ($12m) had been paid, and documents submitted to tax authorities and mentioned by the newspaper reportedly show that part of the funds was indeed transferred to an intermediary company.

The sum is far above the budgets of two internationally successful Brazilian films: I’m Still Here, which won the Oscar for best international feature in 2025 with a budget of $8.9m, and The Secret Agent, nominated for best picture in 2026 with $5.6m.

Some have drawn comparisons between the unusually high budget for Brazilian standards and the $40m plus $35m spent on marketing by Amazon for a documentary about the US first lady, Melania Trump.

In Bolsonaro’s case, the film’s production company and its executive producer and screenwriter – a former Bolsonaro minister – denied that the project received any funds from Vorcaro or his bank.

Barros said: “The budget is completely out of step with a national production, and the foreign participants are not top-tier. The way this money was raised still needs to be investigated … The producers say the money never reached them. So where did it go?”