The British broadcaster committed a "serious breach" of industry standards by omitting to mention that the narrator of a film about the Gaza situation was the son of a Hamas official, as determined by UK media regulator Ofcom.
An probe by the media regulator into Gaza: How to Survive a Warzone has determined that the documentary was "significantly deceptive".
The chief executive of the broadcaster had previously apologised, saying there had been "a significant failing in relation to truthfulness".
Ofcom has ordered the broadcaster to air a peak-time declaration about its findings.
"Given this constitutes a major infringement of our regulations, we are instructing the BBC to transmit a announcement of our findings against it on the BBC's second channel at 21:00, with a schedule to be determined," the regulator stated.
'Possibility to Undermine Confidence'
The watchdog's report said: "Our probe found that the film's omission to reveal that the voice's father held a role in the Hamas-controlled authority was substantially inaccurate.
"Consequently that the public did not have essential details which may have been extremely pertinent to their evaluation of the voice and the content he presented.
"Trust is at the center of the relationship between a media organization and its audience, notably for a national broadcasting corporation such as the British Broadcasting Corporation.
"This error had the possibility to damage the very considerable amounts of confidence that the public would have put in a factual film from the broadcaster about the conflict in Gaza."
The film was pulled from the BBC's streaming service in February after the presenter's personal associations emerged, and in July an corporation's own inquiry found it breached the organization's content policies on truthfulness.
A representative for the broadcaster stated: "The Ofcom ruling is in accordance with the conclusions of the internal assessment, that there was a significant failing in the documentary in relation to the corporation's content standards on accuracy, which reflects regulation 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we accept Ofcom's decision in complete. We will follow the directive as soon as the timing and wording are finalised."
