Donald Trump’s former lawyer secretly taped a conversation the pair had about payments to an ex-Playboy model, according to a report.
Michael Cohen reportedly recorded the discussion about Karen McDougal before the presidential election in 2016, which Mr Trump went on to win.
Ms McDougal has claimed she had an affair with Mr Trump for nearly a year starting in 2006, shortly after Mr Trumps’ wife gave birth to their son Barron.
According to the New York Times, the FBI seized the recording earlier this year during a raid on Mr Cohen’s office.
Mr Trump’s current lawyer Rudy Giuliani confirmed the authenticity of the recording but said the payment was never made.
Mr Cohen, who is no longer acting for Mr Trump, is being investigated over payments made to women to silence embarrassing news stories about the then presidential candidate leading up to the election.
Karen McDougal sold her story to The National Enquirer in the final months of the presidential campaign but the tabloid did not publish it, keeping it from becoming public.
In March, she sued the publication, asking to be released from their agreement forbidding her from talking about the alleged affair.
Earlier this year, porn star Stormy Daniels filed a lawsuit asking a judge to invalidate a non-disclosure agreement preventing her from talking about her affair with Mr Trump.
Ms Daniels described the agreement as “null and void and of no consequence” because Mr Trump did not sign it.