The British broadcaster engaged in a "major breach" of media regulations by failing to disclose that the voice of a documentary about Gaza was the son of a Hamas administrator, as determined by UK media regulator Ofcom.
An probe by the media regulator into the programme Gaza: How to Survive a Warzone has determined that the film was "significantly deceptive".
The head of the BBC had earlier expressed regret, noting there had been "a significant failing in relation to factual correctness".
Ofcom has ordered the BBC to air a evening declaration about its conclusions.
"Since this amounts to a serious breach of our regulations, we are directing the broadcaster to transmit a statement of our determinations against it on BBC Two at 21:00, with a schedule to be finalised," the regulator stated.
'Potential to Undermine Trust'
The regulator's statement declared: "Our investigation found that the film's lack of disclosure that the narrator's parent served in a position in the Hamas-run authority was significantly deceptive.
"Consequently that the viewers did not have essential details which may have been very significant to their judgment of the presenter and the details he shared.
"Confidence is at the center of the bond between a television network and its audience, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the possibility to erode the exceptionally strong degrees of credibility that audiences would have placed in a BBC factual programme about the Israel-Gaza war."
The film was withdrawn from the online platform in last February after the presenter's familial connections were revealed, and in July an corporation's own inquiry determined it violated the corporation's editorial guidelines on truthfulness.
A representative for the broadcaster commented: "The Ofcom ruling is in agreement with the conclusions of the corporation's inquiry, that there was a serious error in the documentary in relation to the corporation's content standards on truthfulness, which reflects regulation 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we agree with the authority's determination in full. We will adhere to the directive as soon as the timing and language are determined."
