The British broadcaster engaged in a "major breach" of industry standards by failing to disclose that the presenter of a documentary about the Gaza conflict was the son of a Hamas administrator, as determined by UK media regulator Ofcom.
An investigation by the media regulator into Gaza: How to Survive a Warzone has concluded that the programme was "substantially inaccurate".
The head of the BBC had previously apologised, noting there had been "a serious error in relation to factual correctness".
The authority has directed the broadcaster to air a evening statement about its conclusions.
"Given this constitutes a significant violation of our rules, we are directing the broadcaster to transmit a message of our findings against it on the BBC's second channel at nine o'clock in the evening, with a date to be confirmed," it said.
'Possibility to Undermine Confidence'
The authority's statement said: "The inquiry we conducted determined that the documentary's lack of disclosure that the presenter's parent served in a role in the Hamas-controlled authority was substantially inaccurate.
"It meant that the viewers did not have critical information which may have been extremely pertinent to their judgment of the narrator and the information he shared.
"Trust is at the heart of the bond between a media organization and its viewers, especially for a public service broadcaster such as the public broadcaster.
"This failing had the risk to erode the very considerable levels of confidence that the public would have put in a documentary produced by the BBC about the conflict in Gaza."
The programme was withdrawn from the BBC's streaming service in February after the narrator's personal associations came to light, and in July an internal BBC review found it breached the broadcaster's editorial guidelines on truthfulness.
A representative for the broadcaster commented: "The Ofcom ruling is in accordance with the findings of the corporation's inquiry, that there was a significant failing in the documentary in relation to the broadcaster's journalistic policies on accuracy, which reflects Rule 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we agree with Ofcom's decision in complete. We will follow the sanction as soon as the schedule and wording are finalised."
