The British broadcaster committed a "significant breach" of broadcasting rules by omitting to mention that the presenter of a programme about the Gaza situation was the son of a Hamas administrator, as determined by regulatory body Ofcom.
An investigation by Ofcom into the programme Gaza: How to Survive a Warzone has found that the film was "significantly deceptive".
The head of the BBC had previously apologised, noting there had been "a major oversight in relation to factual correctness".
The authority has instructed the BBC to transmit a evening announcement about its conclusions.
"Given this constitutes a major infringement of our rules, we are instructing the BBC to transmit a statement of our conclusions against it on BBC Two at 9pm, with a timing to be finalised," it said.
'Risk to Damage Confidence'
The regulator's report said: "Our probe determined that the film's lack of disclosure that the presenter's parent held a post in the Hamas-run authority was materially misleading.
"It meant that the viewers did not have critical information which may have been extremely pertinent to their judgment of the voice and the content he shared.
"Credibility is at the core of the connection between a broadcaster and its audience, especially for a public service broadcaster such as the public broadcaster.
"This failing had the risk to undermine the very considerable amounts of credibility that audiences would have invested in a BBC factual programme about the Gaza conflict."
The programme was withdrawn from the BBC's streaming service in the month of February after the narrator's family links emerged, and in this past July an corporation's own inquiry found it breached the corporation's journalistic standards on factual correctness.
A BBC spokesperson commented: "The regulator's decision is in accordance with the findings of Peter Johnston's review, that there was a significant failing in the documentary in relation to the corporation's content standards on accuracy, which aligns with clause 2.2 of the regulator's media standards.
"We have apologised for this and we accept Ofcom's decision in full. We will comply with the directive as soon as the timing and wording are finalised."
