The British broadcaster engaged in a "significant breach" of broadcasting rules by failing to disclose that the voice of a film about the Gaza situation was the son of a Hamas representative, as determined by British broadcasting authority Ofcom.
An investigation by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the film was "substantially inaccurate".
The head of the BBC had earlier expressed regret, saying there had been "a major oversight in relation to factual correctness".
The authority has instructed the BBC to air a peak-time announcement about its findings.
"Since this amounts to a major infringement of our regulations, we are directing the corporation to transmit a announcement of our conclusions against it on the BBC's second channel at nine o'clock in the evening, with a schedule to be determined," the statement read.
'Possibility to Undermine Trust'
The authority's report stated: "Our probe found that the programme's omission to reveal that the narrator's male guardian served in a role in the Hamas-run administration was substantially inaccurate.
"This implied that the public did not have critical information which may have been extremely pertinent to their assessment of the presenter and the details he presented.
"Confidence is at the heart of the connection between a television network and its public, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the possibility to damage the very considerable amounts of confidence that the public would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The documentary was removed from the BBC's streaming service in the month of February after the narrator's personal associations came to light, and in this past July an broadcaster's internal assessment concluded it violated the corporation's content policies on accuracy.
A corporation official stated: "The authority's determination is in line with the findings of Peter Johnston's review, that there was a significant failing in the film in relation to the BBC's Editorial Guidelines on truthfulness, which corresponds to regulation 2.2 of the regulator's media standards.
"We have apologised for this and we accept Ofcom's decision in full. We will adhere to the directive as soon as the timing and language are confirmed."
