The public service broadcaster was found to have committed a "significant breach" of media regulations by failing to disclose that the voice of a film about the Gaza situation was the child of a Hamas administrator, as determined by UK media regulator Ofcom.
An investigation by the media regulator into the programme Gaza: How to Survive a Warzone has found that the programme was "substantially inaccurate".
The chief executive of the broadcaster had previously apologised, saying there had been "a significant failing in relation to accuracy".
The authority has ordered the BBC to transmit a peak-time announcement about its conclusions.
"Given this constitutes a significant violation of our rules, we are instructing the broadcaster to transmit a message of our conclusions against it on the BBC's second channel at nine o'clock in the evening, with a schedule to be confirmed," the regulator stated.
'Possibility to Damage Confidence'
The regulator's statement declared: "Our probe found that the documentary's omission to reveal that the presenter's male guardian served in a role in the Hamas-administered administration was significantly deceptive.
"Consequently that the audience did not have essential details which may have been highly relevant to their assessment of the voice and the details he provided.
"Confidence is at the core of the bond between a broadcaster and its public, especially for a national broadcasting corporation such as the public broadcaster.
"This error had the risk to erode the significantly high levels of trust that the public would have invested in a factual film from the broadcaster about the conflict in Gaza."
The documentary was withdrawn from the online platform in last February after the narrator's family links emerged, and in July an broadcaster's internal assessment concluded it breached the corporation's journalistic standards on truthfulness.
A representative for the broadcaster commented: "The regulator's decision is in line with the results of the corporation's inquiry, that there was a major oversight in the programme in relation to the broadcaster's journalistic policies on truthfulness, which aligns with Rule 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we accept the authority's determination in its entirety. We will adhere to the penalty as soon as the date and language are determined."
