The public service broadcaster committed a "serious breach" of media regulations by omitting to mention that the voice of a documentary about the Gaza conflict was the son of a Hamas administrator, as ruled by UK media regulator Ofcom.
An inquiry by the media regulator into Gaza: How to Survive a Warzone has concluded that the film was "materially misleading".
The head of the BBC had previously apologised, stating there had been "a major oversight in relation to truthfulness".
The regulator has directed the corporation to air a prime-time announcement about its findings.
"As this represents a serious breach of our regulations, we are directing the BBC to air a statement of our conclusions against it on the BBC's second channel at nine o'clock in the evening, with a timing to be determined," the statement read.
'Possibility to Erode Confidence'
The regulator's statement declared: "The inquiry we conducted determined that the documentary's omission to reveal that the presenter's male guardian held a role in the Hamas-run authority was substantially inaccurate.
"Consequently that the viewers did not have essential details which may have been very significant to their assessment of the voice and the content he presented.
"Confidence is at the heart of the relationship between a media organization and its public, notably for a public service broadcaster such as the British Broadcasting Corporation.
"This error had the potential to erode the very considerable levels of trust that the public would have invested in a factual film from the broadcaster about the Israel-Gaza war."
The documentary was removed from the BBC's streaming service in February after the presenter's familial connections emerged, and in the month of July an broadcaster's internal assessment determined it violated the corporation's content policies on accuracy.
A corporation official said: "The authority's determination is in accordance with the results of the corporation's inquiry, that there was a significant failing in the documentary in relation to the corporation's content standards on factual correctness, which aligns with clause 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 sanction as soon as the schedule and language are determined."
