Donald Trump's former attorney Michael Cohen is throwing cold water on a claim from a onetime White House aide that she saw the president eat a piece of paper in the Oval Office.

In her forthcoming book Omarosa Manigault Newman hints that Trump was trying to destroy a note Cohen handed him, in order to prevent archivists from collecting it.

'I saw him put a note in his mouth,' Manigault Newman writes. 'Since Trump was ever the germaphobe, I was shocked he appeared to be chewing and swallowing the paper. It must have been something very, very sensitive.'

Cohen mocked the idea Sunday on Twitter.

'To the many dozens of #journalists who called me, questioning @OMAROSA claim in her new book that @POTUS @realDonaldTrump took a note from me, put it in his mouth and ate it...I saw NO such thing and am shocked anyone would take this seriously,' he said.

Former Trump lawyer Michael Cohen (left) on Sunday contradicted a story that suggested the president chewed and swallowed a paper note from him rather than allow White House archivists to have it

'I saw NO such thing,' Cohen tweeted, 'and am shocked anyone would take this seriously'

Omarosa Manigault Newman told the story, and many others, in her book 'Unhinged' which goes on sale August 14

The Washington Post first reported on the odd claim in 'Unhinged,' which will be available Tuesday. At the time several White House aides 'laughed at the assertion and said it was not true,' the paper reported.

Cohen's legal troubles have tested his past loyalty to the president, leading some Washington-watchers to speculate that he might turn on his old boss by helping Special Counsel Robert Mueller with his lengthy Russia probe.

The U.S. Attorney for the Southern District of New York is reportedly investigating him for bank fraud and campaign finance violations in connection with a six-figure hush money payout he made in 2016 on Trump's behalf to a pornographic actress. The woman, who goes by the stage name Stormy Daniels, had claimed she slept with the then-future-president a decade earlier.

Cohen's position – on the outside of the White House looking in, facing a lengthy prison term and the loss of his law license for making tapes of his clients – makes his dismissal of Manigault Newman's latest claim all the more remarkable.

Several other claims in 'unhinged' have already come under fire from inside Trumpworld.

Pollster Frank Luntz read in Omarosa's book that he had spread rumors about the existence of audio showing Trump using the n-word – something he quickly denied in public

Trump campaign spokeswoman Katrina Pierson is another of Omarosa's purported sources of information about the white-whale audio, but she too insists the author is lying

Kellyanne Conway's half-Filipino husband George dismissed as 'not credible' and 'absurd' an Omarosa story about Trump referring to him with racial slurs

Current and past White House officials have pooh-poohed her story about the president fighting with the head of the presidential mansion's household staff over his demand for a tanning bed in the residence.

There never has been one there, they say, and Trump never issued a request.

One former White House official employed in the West Wing while Omarosa was there told DailyMail.com on Friday that 'it never happened.'

'Are you kidding me?' asked the aide. 'If that were true, he would have tweeted about it by now and challenged Putin to get one.'

Manigault Newman has also claimed pollster Frank Luntz and Trump 2020 campaign spokeswoman Katrina Pierson each told her about the existence of outtake audio from 'The Apprentice' in which Trump used the 'n-word' to refer to African-Americans.

Both have said since Friday that it never happened.

George Conway, the Trump-skeptic husband of presidential counselor Kallyanne Conway, ridiculed another claim from the book on Friday, dismissing Manigault Newman's tale of the president using ethnic slurs against him.

Conway, who is half Filipino, said it was 'absurd all around' to think Trump would call him a 'flip' and a 'goo-goo.'

The author, who has swung from presidential booster to a hated mudslinger, also has told two different stories about whether she has heard the purported audio herself.

If Trump did indeed eat a piece of paper to keep it secret, it wouldn't be the first time he has made it difficult for the National Archives to keep complete records of his presidency.

Michael Cohen's apparent 180-degree turn from presidential insider to opponent makes his defense of Trump allthe more remarkable

Disputing Omarosa's claim that the president fought with the chief of the White House's household staff over installing a tanning bed in the presidential residence, a former coworker said 'it never happened'

Manigault Newman is on a full-court-press book tour and drawing fire every step along the way

A group of records management analysts in the Old Executive Office Building next to the White House has been tasked for more than a year with taping together documents that Trump rips up when he's done with them.

Armed with rolls of clear Scotch tape, the team sifts through large piles of shredded paper and puts them back together like a lissome jigsaw puzzle.

In some cases the president tears sheets once down the middle. In others he shreds them into confetti.

The Presidential Records Act requires the White House to preserve all communications that reach the president and send them to the National Archives.

That includes memos, letters, emails and papers – anything Trump touches.