The News of the World paid £125,000 ($255,000) to the fund supporting the search for Madeleine McCann as part of an apology for publishing Kate McCann's diaries - on condition that the terms of the deal remained secret.
The payment was made after the missing girl's parents expressed their outrage at the story, which Kate McCann said made her feel "mentally raped". All the parties involved in the negotiations over the payment, which was agreed in September 2008, were asked to sign a confidentiality agreement hiding the scale of the newspaper's culpability.
The payment was made despite claims by the defunct newspaper's editor at the Leveson inquiry last week that he believed he had had the full support of the McCanns to publish.
Colin Myler, who edited the NOTW from 2007 until it closed this year, told the inquiry he had received repeated assurances from his head of news, Ian Edmondson, that the McCanns' spokesman, Clarence Mitchell, supported publication - a claim which has been strenuously denied.
Myler told the inquiry that he subsequently ran an apology and paid a "substantial sum" because "he felt very bad that she didn't know".