The public service broadcaster was found to have committed a "significant breach" of broadcasting rules by not revealing that the voice of a documentary about the Gaza conflict was the child of a Hamas representative, as ruled by British broadcasting authority Ofcom.
An inquiry by Ofcom into Gaza: How to Survive a Warzone has concluded that the documentary was "significantly deceptive".
The BBC's director general had previously apologised, noting there had been "a major oversight in relation to factual correctness".
The regulator has directed the broadcaster to transmit a prime-time announcement about its conclusions.
"Since this amounts to a serious breach of our code, we are instructing the corporation to broadcast a message of our determinations against it on the BBC's second channel at nine o'clock in the evening, with a timing to be confirmed," the statement read.
'Possibility to Erode Credibility'
The regulator's statement declared: "Our probe found that the documentary's lack of disclosure that the presenter's male guardian held a position in the Hamas-controlled government was materially misleading.
"It meant that the audience did not have critical information which may have been extremely pertinent to their judgment of the narrator and the content he presented.
"Confidence is at the heart of the bond between a media organization and its public, notably for a public service broadcaster such as the British Broadcasting Corporation.
"This oversight had the possibility to damage the very considerable degrees of credibility that audiences would have invested in a BBC factual programme about the conflict in Gaza."
The film was pulled from iPlayer in the month of February after the boy's familial connections came to light, and in the month of July an internal BBC review found it breached the broadcaster's journalistic standards on truthfulness.
A BBC spokesperson stated: "The regulator's decision is in line with the findings of the internal assessment, that there was a significant failing in the film in relation to the BBC's Editorial Guidelines on truthfulness, which aligns with Rule 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we comply with the regulator's ruling in its entirety. We will follow the directive as soon as the timing and wording are confirmed."
