Donald Trump dismissed them as 'total fabrication' while the Kremlin called them 'fiction'.
And looking at the allegations of the outlandish 'dirty dossier' which was released to the world last night, some will question why the claims were ever taken seriously.
The unverified accusations include depraved sex acts in a Moscow hotel room, a five-year secret link to the Russian regime and property 'sweeteners' involving World Cup 2018.
The President-elect denounced the release of the memo this morning after it was reported that he was told in a briefing Russia claimed it had compromising personal and financial information about him.
CNN reported that the material was based on memos compiled by a British intelligence operative - and the hunt is now on to identify the allegedly spy, as well as investigate how the dossier became public.
Here are some of the main allegations that surfaced in the explosive memo:
Dealings: The dossier apparently includes claims about Trump's financial dealings with Moscow. In 2013 he held his Miss Universe contest in the Russian capital
Lurid sex claims
The memo claims Russian authorities tried to 'exploit Trump's personal obsessions and sexual perversion' in order to compromise him.
The headline claim is that they arranged for him to stay in a Moscow hotel which was covered by secret FSB cameras.
The report states that in 2013 Trump hired prostitutes to urinate on the bed of the Presidential Suite at the Moscow Ritz Carlton, where he knew Barack and Michelle Obama had previously stayed.
It says: 'Trump's unorthodox behavior in Russia over the years had provided the authorities there with enough embarrassing material on the now Republican presidential candidate to be able to blackmail him if they so wished.'
In a press conference today, the President-elect pointed out that because Russian hotel rooms are known to be rigged with cameras, no one would choose to engage in potentially compromising behavior there.
And he added that he is a 'germophobe' in a humorous bid to distance himself from the most disgusting claim.
Degrading acts in bed used by president: The extraordinary - and entirely unverified - allegations that Donald Trump ordered prostitutes to commit degrading sex acts in the Ritz-Carlton in Moscow are contained in a dossier drawn up by a former British spy
Part of the document is seen above. Click here to see the full document first published by Buzzfeed
The dossier claimed that the Russian regime had been 'cultivating, supporting and assisting Trump for at least five years'
The document states that Trump had declined 'sweetener' real estate deals in Russia that the Kremlin lined up in order to cultivate him.
The business proposals were said to be 'in relation to the ongoing 2018 World Cup soccer tournament'.
Russia 'cultivated' Trump for five years
The dossier claimed that the Russian regime had been 'cultivating, supporting and assisting Trump for at least five years'.
According to the document, one source even claimed that 'the Trump operation was both supported and directed by Russian President Vladimir Putin' with the aim being to 'sow discord'.
Kremlin overlord: Trump was told that Vladimir Putin was in possession of apparently incendiary material
According to the document, one source even claimed that 'the Trump operation was both supported and directed by Russian President Vladimir Putin' with the aim being to 'sow discord'
Putin 'wanted to cause divisions in the West'
The report includes claims that Russian President Vladimir Putin himself had endorsed moves to encourage 'splits and divisions in the West.
A dossier on Hillary Clinton
At one point the memo suggests Kremlin spokesman Dmitry Peskov 'controlled' another dossier containing compromising material on Hillary Clinton compiled over 'many years'.
But Peskov denied there was any such material.
The memo stated that the dossier has been compiled since her husband Bill's presidency and that it 'comprised mainly eavesdropped conversations of various sorts rather than details/evidence of unorthodox or embarrassing behavior'.
Elsewhere in the document, it is claimed that Putin was 'motivated by fear and hatred of Hillary Clinton.'
At one point the memo suggests Kremlin spokesman Dmitry Peskov 'controlled' another dossier containing compromising material on Hillary Clinton (pictured) compiled over 'many years'
Elsewhere in the document, it is claimed that Putin was 'motivated by fear and hatred of Hillary Clinton'
At one point the memo says there were reports of 'clandestine meetings' between Donald Trump's lawyer Michael Cohen and Kremlin representatives in August last year in Prague.
However, Trump's counsel Michael Cohen today spoke out against allegations that he secretly met with Kremlin officials.
In response to the report on Tuesday, Cohen tweeted a picture of the front of his passport writing: 'I have never been to Prague in my life.'
CNN is now reporting that the Michael Cohen in the report is not Trump's lawyer.
Targeting 'educated youths'
Another claim in the dossier is that the Russians targeted the 'educated youth' to persuade them to vote for Donald Trump as a way of protesting against the 'Washington Establishment' (Hillary Clinton).
The dossier on Trump also claimed how the Russian's allegedly tried to swing supporters of Bernie Sanders, pictured, towards Trump
However, the report also notes that even if Trump's rival Clinton was to win the presidential election, she would be so bogged down in trying to reunited the United States, she would neglect foreign policy, and therefore not damage Russian interests.
The memo also adds how the aim of the leaking of Democratic party emails to Wikileaks was to swing supporters of Bernie Sanders, who lost the Democratic nomination to Clinton, away from her and to Trump.
It states: 'These voters were perceived as activist and anti-status quo and anti-establishment in that regard sharing many features with the Trump campaign including a visceral dislike of Hillary Clinton.'