The British broadcaster engaged in a "serious breach" of industry standards by omitting to mention that the voice of a programme about the Gaza conflict was the son of a Hamas official, as ruled by UK media regulator Ofcom.
An probe by Ofcom into Gaza: How to Survive a Warzone has concluded that the film was "substantially inaccurate".
The head of the BBC had already issued an apology, stating there had been "a serious error in relation to truthfulness".
The authority has instructed the broadcaster to transmit a peak-time declaration about its decisions.
"Since this amounts to a significant violation of our code, we are directing the broadcaster to broadcast a message of our conclusions against it on BBC Two at nine o'clock in the evening, with a schedule to be confirmed," the regulator stated.
'Possibility to Erode Confidence'
The authority's statement stated: "Our probe concluded that the film's failure to disclose that the narrator's male guardian held a position in the Hamas-controlled government was materially misleading.
"This implied that the audience did not have vital facts which may have been extremely pertinent to their assessment of the voice and the details he presented.
"Credibility is at the heart of the bond between a media organization and its viewers, particularly for a public service broadcaster such as the public broadcaster.
"This oversight had the possibility to undermine the significantly high amounts of trust that viewers would have placed in a factual film from the broadcaster about the conflict in Gaza."
The programme was pulled from the BBC's streaming service in the month of February after the boy's family links came to light, and in the month of July an internal BBC review found it breached the corporation's journalistic standards on accuracy.
A representative for the broadcaster commented: "The Ofcom ruling is in agreement with the findings of the internal assessment, that there was a serious error in the documentary in relation to the broadcaster's journalistic policies on accuracy, which corresponds to Rule 2.2 of the regulator's media standards.
"We expressed regret for this and we accept Ofcom's decision in its entirety. We will follow the directive as soon as the timing and wording are confirmed."
