The British broadcaster committed a "significant breach" of broadcasting rules by omitting to mention that the narrator of a film about the Gaza situation was the offspring of a Hamas administrator, as ruled by British broadcasting authority Ofcom.
An investigation by Ofcom into Gaza: How to Survive a Warzone has determined that the film was "substantially inaccurate".
The chief executive of the broadcaster had earlier expressed regret, noting there had been "a serious error in relation to accuracy".
The authority has directed the BBC to transmit a peak-time declaration about its decisions.
"Given this constitutes a significant violation of our regulations, we are ordering the BBC to transmit a statement of our conclusions against it on BBC Two at 21:00, with a date to be determined," it said.
'Possibility to Damage Trust'
The regulator's announcement declared: "Our investigation concluded that the documentary's lack of disclosure that the narrator's male guardian served in a post in the Hamas-run administration was substantially inaccurate.
"Consequently that the viewers did not have critical information which may have been extremely pertinent to their evaluation of the narrator and the details he shared.
"Trust is at the core of the connection between a media organization and its viewers, particularly for a national broadcasting corporation such as the British Broadcasting Corporation.
"This failing had the potential to erode the significantly high amounts of confidence that the public would have placed in a BBC factual programme about the conflict in Gaza."
The film was pulled from iPlayer in February after the narrator's family links were revealed, and in the month of July an corporation's own inquiry concluded it violated the corporation's journalistic standards on truthfulness.
A representative for the broadcaster stated: "The authority's determination is in accordance with the findings of the internal assessment, that there was a serious error in the programme in relation to the corporation's content standards on truthfulness, which corresponds to Rule 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we agree with Ofcom's decision in complete. We will follow the directive as soon as the timing and language are confirmed."
