The public service broadcaster committed a "major breach" of industry standards by not revealing that the voice of a documentary about the Gaza conflict was the child of a Hamas administrator, as ruled by UK media regulator Ofcom.
An investigation by Ofcom into the programme Gaza: How to Survive a Warzone has concluded that the film was "significantly deceptive".
The chief executive of the broadcaster had already issued an apology, saying there had been "a major oversight in relation to truthfulness".
Ofcom has directed the broadcaster to broadcast a prime-time announcement about its conclusions.
"As this represents a serious breach of our code, we are directing the broadcaster to transmit a statement of our determinations against it on BBC Two at 21:00, with a timing to be confirmed," the regulator stated.
'Potential to Erode Confidence'
The authority's statement declared: "Our probe determined that the programme's omission to reveal that the presenter's male guardian occupied a role in the Hamas-administered government was substantially inaccurate.
"Consequently that the viewers did not have critical information which may have been very significant to their judgment of the voice and the details he provided.
"Credibility is at the heart of the connection between a broadcaster and its audience, notably for a public service broadcaster such as the BBC.
"This error had the potential to damage the exceptionally strong degrees of credibility that audiences would have put in a BBC factual programme about the conflict in Gaza."
The documentary was pulled from iPlayer in February after the narrator's familial connections came to light, and in the month of July an internal BBC review concluded it infringed the corporation's journalistic standards on accuracy.
A representative for the broadcaster said: "The authority's determination is in line with the results of the internal assessment, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on factual correctness, which corresponds to Rule 2.2 of the regulator's media standards.
"We expressed regret for this and we comply with Ofcom's decision in complete. We will follow the sanction as soon as the date and wording are determined."
