The public service broadcaster committed a "significant breach" of media regulations by omitting to mention that the narrator of a programme about the Gaza situation was the child of a Hamas representative, as ruled by UK media regulator Ofcom.
An inquiry by the media regulator into the documentary titled Gaza: How to Survive a Warzone has determined that the documentary was "materially misleading".
The chief executive of the broadcaster had already issued an apology, stating there had been "a major oversight in relation to accuracy".
The regulator has ordered the corporation to broadcast a peak-time declaration about its decisions.
"Given this constitutes a major infringement of our regulations, we are instructing the BBC to broadcast a message of our findings against it on the BBC's second channel at nine o'clock in the evening, with a timing to be determined," the statement read.
'Possibility to Erode Credibility'
The authority's statement stated: "Our probe determined that the film's lack of disclosure that the voice's male guardian held a position in the Hamas-controlled government was significantly deceptive.
"This implied that the viewers did not have essential details which may have been highly relevant to their evaluation of the narrator and the details he presented.
"Credibility is at the center of the relationship between a media organization and its audience, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This oversight had the risk to undermine the exceptionally strong amounts of credibility that viewers would have put in a documentary produced by the BBC about the Israel-Gaza war."
The film was pulled from the online platform in last February after the narrator's familial connections were revealed, and in this past July an internal BBC review determined it violated the organization's editorial guidelines on truthfulness.
A representative for the broadcaster commented: "The authority's determination is in agreement with the conclusions 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 aligns with regulation 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we agree with the regulator's ruling in its entirety. We will comply with the penalty as soon as the timing and wording are determined."
