Claims made by the mother at the heart of the BBC presenter scandal are "rubbish", a lawyer representing the young person has said.
In a letter to the BBC, the lawyer makes claims that throw doubt on the story that has dominated front pages through the weekend.
It says the young person sent a denial to the Sun on Friday evening saying there was "no truth to it".
However, the "inappropriate article" was still published, the lawyer said.
A spokesperson for the Sun said: "We have reported a story about two very concerned parents who made a complaint to the BBC about the behaviour of a presenter and the welfare of their child.
"Their complaint was not acted upon by the BBC.
"We have seen evidence that supports their concerns. It's now for the BBC to properly investigate."
BBC News does not know the identity of the young person and has not spoken directly to them.
It has not seen any of the Sun's body of evidence, or the dossier the Sun reported was handed to the corporation by the family over the weekend.
In their letter, the lawyer writes: "For the avoidance of doubt, nothing inappropriate or unlawful has taken place between our client and the BBC personality and the allegations reported in the Sun newspaper are rubbish."
The Metropolitan Police are "assessing" information from the BBC over the allegations made against the presenter.
BBC: Claims about presenter '''rubbish''' - young person'''s lawyer - BBC News
It's their highest paid presenter on millions every year!
Graham Norton!