The public service broadcaster engaged in a "major breach" of industry standards by failing to disclose that the narrator of a programme about the Gaza situation was the offspring of a Hamas administrator, as determined by UK media regulator Ofcom.
An investigation by Ofcom into the programme Gaza: How to Survive a Warzone has determined that the programme was "significantly deceptive".
The chief executive of the broadcaster had previously apologised, saying there had been "a major oversight in relation to factual correctness".
The authority has ordered the BBC to broadcast a prime-time declaration about its decisions.
"Given this constitutes a serious breach of our regulations, we are instructing the corporation to transmit a message of our determinations against it on the BBC's second channel at nine o'clock in the evening, with a date to be determined," it said.
'Possibility to Erode Trust'
The regulator's statement stated: "The inquiry we conducted determined that the documentary's lack of disclosure that the narrator's parent occupied a post in the Hamas-controlled authority was significantly deceptive.
"It meant that the viewers did not have vital facts which may have been very significant to their assessment of the voice and the content he presented.
"Confidence is at the core of the connection between a media organization and its viewers, especially for a state-funded media outlet such as the BBC.
"This error had the potential to erode the exceptionally strong degrees of trust that audiences would have put in a documentary produced by the BBC about the Israel-Gaza war."
The programme was removed from the BBC's streaming service in February after the narrator's familial connections came to light, and in the month of July an broadcaster's internal assessment concluded it violated the broadcaster's editorial guidelines on truthfulness.
A representative for the broadcaster commented: "The authority's determination is in agreement with the findings of the internal assessment, that there was a major oversight in the programme 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 follow the directive as soon as the date and wording are finalised."
