The public service broadcaster was found to have committed a "serious breach" of broadcasting rules by failing to disclose that the narrator of a documentary about the Gaza conflict was the offspring of a Hamas representative, as ruled by UK media regulator Ofcom.
An investigation by the media regulator into the documentary titled Gaza: How to Survive a Warzone has found that the programme was "substantially inaccurate".
The chief executive of the broadcaster had previously apologised, noting there had been "a major oversight in relation to accuracy".
Ofcom has ordered the BBC to broadcast a prime-time announcement about its conclusions.
"Given this constitutes a major infringement of our code, we are ordering the broadcaster to transmit a message of our determinations against it on BBC Two at nine o'clock in the evening, with a schedule to be finalised," the statement read.
'Potential to Undermine Trust'
The regulator's report declared: "Our investigation concluded that the film's omission to reveal that the presenter's parent served in a role in the Hamas-controlled authority was materially misleading.
"This implied that the viewers did not have vital facts which may have been very significant to their judgment of the presenter and the details he provided.
"Confidence is at the center of the relationship between a media organization and its audience, notably for a national broadcasting corporation such as the British Broadcasting Corporation.
"This oversight had the risk to undermine the significantly high levels of confidence that viewers would have placed in a BBC factual programme about the Israel-Gaza war."
The documentary was withdrawn from the BBC's streaming service in February after the boy's personal associations emerged, and in July an internal BBC review found it breached the organization's editorial guidelines on factual correctness.
A representative for the broadcaster said: "The regulator's decision is in agreement with the conclusions of the internal assessment, that there was a serious error in the documentary in relation to the corporation's content standards on accuracy, which reflects regulation 2.2 of the regulator's media standards.
"We have apologised for this and we comply with the authority's determination in full. We will follow the sanction as soon as the timing and language are finalised."
