The public service broadcaster engaged in a "significant breach" of media regulations by failing to disclose that the narrator of a programme about the Gaza situation was the son of a Hamas representative, according to British broadcasting authority Ofcom.
An inquiry by Ofcom into Gaza: How to Survive a Warzone has found that the film was "materially misleading".
The head of the BBC had previously apologised, noting there had been "a serious error in relation to accuracy".
The authority has instructed the BBC to broadcast a peak-time statement about its findings.
"Given this constitutes a significant violation of our regulations, we are ordering the broadcaster to air a statement of our determinations against it on BBC2 at nine o'clock in the evening, with a date to be determined," the statement read.
'Risk to Damage Trust'
The authority's statement said: "The inquiry we conducted determined that the film's failure to disclose that the voice's male guardian occupied a role in the Hamas-controlled administration was significantly deceptive.
"It meant that the viewers did not have essential details which may have been extremely pertinent to their assessment of the voice and the content he presented.
"Confidence is at the core of the bond between a media organization and its viewers, notably for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the risk to erode the exceptionally strong amounts of credibility that the public would have placed in a BBC factual programme about the Gaza conflict."
The programme was withdrawn from iPlayer in last February after the narrator's familial connections were revealed, and in the month of July an internal BBC review found it infringed the corporation's content policies on factual correctness.
A BBC spokesperson said: "The authority's determination is in accordance with the conclusions of the corporation's inquiry, that there was a serious error in the documentary in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to Rule 2.2 of the regulator's media standards.
"We expressed regret for this and we comply with the authority's determination in complete. We will adhere to the directive as soon as the timing and wording are finalised."
