The British broadcaster committed a "serious breach" of media regulations by failing to disclose that the voice of a documentary about Gaza was the child of a Hamas administrator, according to regulatory body Ofcom.
An investigation by the media regulator into the documentary titled Gaza: How to Survive a Warzone has concluded that the film was "significantly deceptive".
The BBC's director general had previously apologised, saying there had been "a major oversight in relation to accuracy".
The authority has ordered the corporation to air a prime-time statement about its conclusions.
"Given this constitutes a significant violation of our code, we are directing the BBC to transmit a message of our findings against it on BBC2 at 9pm, with a schedule to be finalised," the regulator stated.
'Potential to Undermine Credibility'
The watchdog's report stated: "Our investigation found that the programme's failure to disclose that the voice's father held a role in the Hamas-controlled government was materially misleading.
"Consequently that the audience did not have critical information which may have been highly relevant to their judgment of the narrator and the details he shared.
"Trust is at the center of the relationship between a television network and its audience, especially for a public service broadcaster such as the BBC.
"This error had the potential to erode the exceptionally strong degrees of credibility that viewers would have placed in a documentary produced by the BBC about the Israel-Gaza war."
The documentary was removed from the BBC's streaming service in February after the narrator's personal associations emerged, and in this past July an internal BBC review determined it breached the corporation's content policies on factual correctness.
A corporation official said: "The regulator's decision is in accordance with the conclusions of the internal assessment, that there was a serious error in the programme in relation to the corporation's content standards on truthfulness, which aligns with Rule 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we comply with the regulator's ruling in its entirety. We will comply with the sanction as soon as the schedule and language are determined."
