The public service broadcaster committed a "major breach" of broadcasting rules by not revealing that the voice of a documentary about the Gaza conflict was the son of a Hamas administrator, according to regulatory body Ofcom.
An inquiry by Ofcom into the programme Gaza: How to Survive a Warzone has found that the programme was "substantially inaccurate".
The chief executive of the broadcaster had previously apologised, saying there had been "a serious error in relation to truthfulness".
The regulator has directed the corporation to air a evening declaration about its decisions.
"Given this constitutes a serious breach of our regulations, we are ordering the BBC to transmit a message of our determinations against it on BBC2 at 21:00, with a timing to be determined," it said.
'Potential to Damage Trust'
The authority's announcement declared: "Our probe concluded that the film's failure to disclose that the narrator's father occupied a post in the Hamas-run administration was significantly deceptive.
"Consequently that the public did not have critical information which may have been very significant to their assessment of the narrator and the content he shared.
"Credibility is at the center of the relationship between a television network and its public, particularly for a national broadcasting corporation such as the British Broadcasting Corporation.
"This oversight had the possibility to undermine the very considerable amounts of confidence that viewers would have invested in a documentary produced by the BBC about the conflict in Gaza."
The programme was withdrawn from the online platform in the month of February after the presenter's familial connections came to light, and in the month of July an corporation's own inquiry concluded it violated the broadcaster's journalistic standards on accuracy.
A BBC spokesperson stated: "The authority's determination is in line with the results of the corporation's inquiry, that there was a significant failing in the documentary in relation to the corporation's content standards on accuracy, which aligns with regulation 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we accept the authority's determination in complete. We will follow the sanction as soon as the timing and wording are finalised."
