The public service broadcaster was found to have committed a "significant breach" of industry standards by not revealing that the presenter of a programme about Gaza was the son of a Hamas representative, according to British broadcasting authority Ofcom.
An investigation by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the documentary was "substantially inaccurate".
The chief executive of the broadcaster had already issued an apology, saying there had been "a significant failing in relation to factual correctness".
The regulator has instructed the corporation to transmit a peak-time declaration about its findings.
"Since this amounts to a significant violation of our regulations, we are directing the BBC to transmit a message of our findings against it on BBC Two at 21:00, with a timing to be finalised," the regulator stated.
'Potential to Erode Confidence'
The regulator's statement stated: "Our investigation determined that the programme's omission to reveal that the presenter's male guardian occupied a role in the Hamas-administered authority was significantly deceptive.
"This implied that the audience did not have vital facts which may have been extremely pertinent to their judgment of the voice and the information he presented.
"Trust is at the heart of the bond between a media organization and its public, notably for a national broadcasting corporation such as the BBC.
"This error had the possibility to undermine the significantly high degrees of confidence that audiences would have put in a BBC factual programme about the Israel-Gaza war."
The film was pulled from the BBC's streaming service in February after the narrator's personal associations were revealed, and in this past July an broadcaster's internal assessment determined it infringed the corporation's editorial guidelines on factual correctness.
A representative for the broadcaster stated: "The Ofcom ruling is in accordance with the conclusions of the internal assessment, that there was a serious error in the documentary in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to Rule 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we accept the regulator's ruling in complete. We will comply with the sanction as soon as the schedule and wording are confirmed."
