The British broadcaster was found to have committed a "major breach" of media regulations by omitting to mention that the voice of a programme about the Gaza conflict was the offspring of a Hamas representative, as ruled by UK media regulator Ofcom.
An investigation by Ofcom into Gaza: How to Survive a Warzone has determined that the documentary was "significantly deceptive".
The head of the BBC had earlier expressed regret, noting there had been "a serious error in relation to accuracy".
The regulator has directed the broadcaster to air a peak-time statement about its conclusions.
"As this represents a serious breach of our code, we are ordering the corporation to transmit a announcement of our findings against it on BBC Two at 9pm, with a schedule to be determined," the regulator stated.
'Possibility to Erode Credibility'
The regulator's report stated: "The inquiry we conducted concluded that the programme's lack of disclosure that the narrator's father served in a post in the Hamas-run authority was substantially inaccurate.
"This implied that the audience did not have essential details which may have been highly relevant to their assessment of the presenter and the content he shared.
"Credibility is at the core of the connection between a media organization and its public, notably for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the potential to damage the exceptionally strong degrees of credibility that viewers would have put in a BBC factual programme about the conflict in Gaza."
The programme was pulled from the BBC's streaming service in last February after the narrator's family links were revealed, and in this past July an broadcaster's internal assessment found it violated the corporation's journalistic standards on factual correctness.
A representative for the broadcaster commented: "The Ofcom ruling is in accordance with the conclusions of the corporation's inquiry, that there was a major oversight in the documentary in relation to the BBC's Editorial Guidelines on truthfulness, which aligns with Rule 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we comply with the authority's determination in its entirety. We will comply with the directive as soon as the date and wording are finalised."
