A POLYGRAPH exam taken by Stormy Daniels in 2011 indicated the adult film star was telling the truth about her alleged affair with Donald Trump.

According to NBC News, the three-question test, which was done at the request of a magazine, determined that there was a higher than 99 per cent probability that Daniels, whose real name is Stephanie Clifford, was being honest when she said she and Donald Trump has unprotected sex in 2006. The magazine didn’t publish the information at the time.

The polygraph examiner issued a declaration on Monday, March 19, 2018, stating that the 2011 report was authentic.

In the test, Daniels was asked three questions: Did you have vaginal intercourse with Donald Trump?, Did you have unprotected sex with Donald Trump?, and Did Trump say he would get you on The Apprentice?
According to the report, Daniels answered “Yes” to all three.

The test concluded she was telling the truth when answering the first two questions, but was inconclusive for the third.

A lawyer for Daniels, Michael Avanatti, told NBC News the test was taken and passed long before Trump ran for president.

“Long before Mr. Trump announced his candidacy for the presidency, Ms Clifford passed a lie-detector test confirming her relationship with Mr Trump,” Mr Avenatti said.

“Where are his test results claiming otherwise? Where are Mr Cohen’s test results claiming otherwise? When this is over, the American people will know the truth about the relationship and the cover-up.”

Mr [Michael] Cohen is Trump’s lawyer.

Daniels is currently in a legal battle with Trump for violating a 2016 nondisclosure agreement that prevents her from discussing her affair with the now US president.

The White House has denied the affair took place.

The news comes as a former Playboy model, who also said she had an affair with US President Donald Trump, has filed a lawsuit in California to release her from a legal agreement requiring her to stay silent.

It makes her the second woman this month to contest an arrangement to keep quiet about an alleged extramarital relationship with Trump.

Karen McDougal filed the lawsuit in Los Angeles Superior Court against American Media, publisher of the National Enquirer, which paid her $US150,000 (A$195,000) in 2016 to keep quiet on the matter, according to a copy of the lawsuit provided by her lawyer, Peter Stris.

The lawsuit comes a month after the New Yorker reported on the alleged affair and a move by American Media to pay McDougal for exclusive rights to her story, which it never published.

The New Yorker article noted that American Media head David Pecker has described Trump as a “personal friend”.

“AMI lied to me, made empty promises, and repeatedly intimidated and manipulated me,” McDougal, who was Playboy magazine’s 1998 Playmate of the Year, said in a statement on Tuesday.

“I just want the opportunity to set the record straight and move on with my life, free from this company, its executives, and its lawyers.”

Stormy Daniels sued the President on March 6, stating that Trump never signed an agreement for her to keep her quiet about an “intimate” extramarital relationship between them. Daniels received $US130,000 (A$169,000) under that agreement.

Earlier this week, a law firm representing Trump and the corporation that paid Daniels said in a court filing it was seeking at least $US20 million (A$26 million) in damages for multiple violations of the nondisclosure agreement.