The public service broadcaster engaged in a "significant breach" of broadcasting rules by not revealing that the presenter of a documentary about Gaza was the son of a Hamas official, as ruled by British broadcasting authority Ofcom.
An inquiry by Ofcom into the documentary titled Gaza: How to Survive a Warzone has found that the programme was "significantly deceptive".
The BBC's director general had earlier expressed regret, saying there had been "a significant failing in relation to truthfulness".
Ofcom has ordered the broadcaster to broadcast a prime-time declaration about its conclusions.
"Given this constitutes a significant violation of our code, we are directing the broadcaster to broadcast a statement of our findings against it on BBC Two at 21:00, with a date to be determined," the statement read.
'Possibility to Undermine Trust'
The regulator's announcement stated: "Our probe concluded that the programme's failure to disclose that the voice's male guardian served in a position in the Hamas-administered administration was materially misleading.
"Consequently that the public did not have critical information which may have been highly relevant to their assessment of the presenter and the content he provided.
"Credibility is at the center of the connection between a broadcaster and its public, particularly for a state-funded media outlet such as the British Broadcasting Corporation.
"This error had the risk to damage the very considerable levels of credibility that audiences would have placed in a BBC factual programme about the Israel-Gaza war."
The film was pulled from iPlayer in last February after the narrator's personal associations emerged, and in this past July an internal BBC review determined it violated the organization's content policies on accuracy.
A corporation official stated: "The authority's determination is in agreement with the conclusions of the corporation's inquiry, that there was a major oversight in the film in relation to the broadcaster's journalistic policies on accuracy, which corresponds to Rule 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we agree with the regulator's ruling in full. We will comply with the penalty as soon as the timing and wording are determined."
