The public service broadcaster committed a "significant breach" of industry standards by failing to disclose that the presenter of a documentary about the Gaza situation was the son of a Hamas representative, according to UK media regulator Ofcom.
An investigation by the broadcasting watchdog into Gaza: How to Survive a Warzone has found that the film was "materially misleading".
The chief executive of the broadcaster had already issued an apology, noting there had been "a significant failing in relation to factual correctness".
The regulator has ordered the BBC to broadcast a peak-time statement about its conclusions.
"Since this amounts to a serious breach of our regulations, we are directing the corporation to air a statement of our determinations against it on the BBC's second channel at 9pm, with a schedule to be determined," the regulator stated.
'Risk to Erode Credibility'
The authority's report declared: "Our investigation found that the documentary's failure to disclose that the voice's father served in a post in the Hamas-administered authority was substantially inaccurate.
"Consequently that the audience did not have critical information which may have been highly relevant to their judgment of the voice and the content he presented.
"Trust is at the center of the connection between a media organization and its audience, notably for a national broadcasting corporation such as the British Broadcasting Corporation.
"This error had the potential to undermine the very considerable levels of confidence that viewers would have put in a BBC factual programme about the conflict in Gaza."
The film was removed from the BBC's streaming service in last February after the presenter's family links emerged, and in this past July an broadcaster's internal assessment found it breached the corporation's journalistic standards on truthfulness.
A representative for the broadcaster stated: "The regulator's decision is in line with the findings of the internal assessment, that there was a serious error in the documentary in relation to the corporation's content standards on factual correctness, which aligns with clause 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we agree with the authority's determination in complete. We will comply with the sanction as soon as the timing and wording are determined."
