The British broadcaster was found to have committed a "major breach" of media regulations by omitting to mention that the narrator of a film about the Gaza conflict was the offspring of a Hamas representative, as determined by regulatory body Ofcom.
An probe by the media regulator into Gaza: How to Survive a Warzone has concluded that the film was "substantially inaccurate".
The chief executive of the broadcaster had already issued an apology, saying there had been "a serious error in relation to truthfulness".
Ofcom has instructed the BBC to broadcast a prime-time announcement about its conclusions.
"Given this constitutes a significant violation of our code, we are instructing the corporation to transmit a statement of our findings against it on BBC2 at 9pm, with a schedule to be confirmed," the regulator stated.
'Possibility to Erode Confidence'
The regulator's report said: "The inquiry we conducted concluded that the documentary's lack of disclosure that the presenter's parent served in a position in the Hamas-run authority was significantly deceptive.
"This implied that the viewers did not have critical information which may have been extremely pertinent to their judgment of the presenter and the details he presented.
"Confidence is at the heart of the relationship between a television network and its viewers, especially for a state-funded media outlet such as the BBC.
"This oversight had the potential to erode the very considerable degrees of confidence that audiences would have invested in a factual film from the broadcaster about the Israel-Gaza war."
The film was pulled from the online platform in February after the narrator's familial connections came to light, and in July an corporation's own inquiry concluded it infringed the broadcaster's content policies on accuracy.
A representative for the broadcaster stated: "The Ofcom ruling is in agreement with the conclusions of the internal assessment, that there was a significant failing in the programme in relation to the broadcaster's journalistic policies on accuracy, which reflects clause 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept Ofcom's decision in complete. We will adhere to the sanction as soon as the date and wording are confirmed."
