The British broadcaster committed a "serious breach" of broadcasting rules by omitting to mention that the narrator of a programme about Gaza was the son of a Hamas official, according to regulatory body Ofcom.
An probe by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has found that the programme was "materially misleading".
The chief executive of the broadcaster had already issued an apology, saying there had been "a major oversight in relation to truthfulness".
The regulator has instructed the BBC to transmit a peak-time announcement about its decisions.
"As this represents a major infringement of our rules, we are directing the BBC to transmit a announcement of our determinations against it on the BBC's second channel at 21:00, with a schedule to be confirmed," it said.
'Risk to Undermine Trust'
The watchdog's report declared: "The inquiry we conducted concluded that the film's failure to disclose that the voice's male guardian held a position in the Hamas-controlled authority was substantially inaccurate.
"Consequently that the public did not have vital facts which may have been highly relevant to their evaluation of the voice and the content he shared.
"Confidence is at the heart of the bond between a television network and its audience, notably for a public service broadcaster such as the public broadcaster.
"This failing had the potential to undermine the very considerable degrees of credibility that audiences would have placed in a documentary produced by the BBC about the Israel-Gaza war."
The film was removed from the online platform in February after the narrator's familial connections emerged, and in the month of July an broadcaster's internal assessment found it violated the broadcaster's content policies on truthfulness.
A BBC spokesperson said: "The Ofcom ruling is in line with the findings of the corporation's inquiry, that there was a serious error in the programme in relation to the broadcaster's journalistic policies on accuracy, which reflects regulation 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept Ofcom's decision in its entirety. We will follow the directive as soon as the date and wording are finalised."
