The British broadcaster was found to have committed a "serious breach" of broadcasting rules by not revealing that the voice of a documentary about Gaza was the offspring of a Hamas administrator, according to regulatory body Ofcom.
An inquiry by Ofcom into the programme Gaza: How to Survive a Warzone has found that the documentary was "significantly deceptive".
The head of the BBC had previously apologised, noting there had been "a significant failing in relation to factual correctness".
The regulator has instructed the broadcaster to air a peak-time announcement about its decisions.
"Given this constitutes a major infringement of our rules, we are instructing the BBC to transmit a announcement of our findings against it on BBC Two at 21:00, with a schedule to be confirmed," the statement read.
'Risk to Undermine Credibility'
The regulator's announcement stated: "The inquiry we conducted concluded that the programme's failure to disclose that the voice's male guardian occupied a post in the Hamas-run government was materially misleading.
"This implied that the public did not have essential details which may have been very significant to their judgment of the voice and the details he presented.
"Credibility is at the core of the connection between a media organization and its audience, notably for a state-funded media outlet such as the public broadcaster.
"This error had the risk to damage the exceptionally strong levels of confidence that viewers would have invested in a factual film from the broadcaster about the Israel-Gaza war."
The programme was removed from the BBC's streaming service in the month of February after the presenter's personal associations were revealed, and in July an internal BBC review determined it violated the organization's journalistic standards on factual correctness.
A representative for the broadcaster stated: "The regulator's decision is in accordance with the findings of the corporation's inquiry, that there was a significant failing in the film in relation to the corporation's content standards on accuracy, which aligns with Rule 2.2 of the regulator's media standards.
"We expressed regret for this and we agree with the authority's determination in its entirety. We will comply with the sanction as soon as the date and wording are confirmed."
