The BBC engaged in a "serious breach" of media regulations by not revealing that the presenter of a film about the Gaza situation was the offspring of a Hamas administrator, according to British broadcasting authority Ofcom.
An inquiry by the media regulator into the programme Gaza: How to Survive a Warzone has determined that the documentary was "significantly deceptive".
The chief executive of the broadcaster had previously apologised, stating there had been "a major oversight in relation to accuracy".
The regulator has ordered the BBC to air a evening declaration about its findings.
"Given this constitutes a major infringement of our rules, we are ordering the broadcaster to broadcast a announcement of our findings against it on BBC Two at 9pm, with a date to be confirmed," the statement read.
'Possibility to Erode Confidence'
The regulator's announcement stated: "Our investigation found that the programme's failure to disclose that the voice's father occupied a post in the Hamas-administered administration was substantially inaccurate.
"Consequently that the viewers did not have critical information which may have been extremely pertinent to their evaluation of the voice and the details he provided.
"Confidence is at the center of the bond between a media organization and its public, particularly for a public service broadcaster such as the British Broadcasting Corporation.
"This failing had the possibility to undermine the exceptionally strong levels of trust that viewers would have placed in a documentary produced by the BBC about the Israel-Gaza war."
The film was withdrawn from iPlayer in the month of February after the narrator's personal associations emerged, and in the month of July an corporation's own inquiry determined it violated the broadcaster's journalistic standards on truthfulness.
A BBC spokesperson stated: "The authority's determination is in accordance with the findings of Peter Johnston's review, that there was a serious error in the film in relation to the corporation's content standards on accuracy, which reflects clause 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we agree with the regulator's ruling in full. We will adhere to the directive as soon as the timing and language are determined."