The British broadcaster was found to have committed a "major breach" of industry standards by not revealing that the presenter of a film about Gaza was the child of a Hamas official, according to British broadcasting authority Ofcom.
An probe by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has determined that the film was "substantially inaccurate".
The BBC's director general had already issued an apology, noting there had been "a significant failing in relation to accuracy".
The regulator has ordered the corporation to broadcast a prime-time announcement about its decisions.
"Given this constitutes a serious breach of our rules, we are directing the BBC to air a statement of our findings against it on the BBC's second channel at 21:00, with a timing to be confirmed," it said.
'Risk to Erode Confidence'
The authority's statement declared: "Our probe determined that the documentary's lack of disclosure that the presenter's male guardian served in a position in the Hamas-administered authority was materially misleading.
"Consequently that the audience did not have essential details which may have been extremely pertinent to their evaluation of the voice and the content he shared.
"Trust is at the core of the bond between a television network and its audience, notably for a public service broadcaster such as the BBC.
"This oversight had the risk to erode the exceptionally strong levels of trust that audiences would have put in a documentary produced by the BBC about the Israel-Gaza war."
The film was removed from the BBC's streaming service in February after the narrator's family links were revealed, and in the month of July an internal BBC review concluded it breached the broadcaster's editorial guidelines on truthfulness.
A corporation official commented: "The authority's determination is in agreement with the results of Peter Johnston's review, that there was a major oversight in the programme in relation to the broadcaster's journalistic policies on accuracy, which reflects regulation 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we comply with Ofcom's decision in full. We will comply with the sanction as soon as the date and wording are finalised."
