The public service broadcaster committed a "major breach" of broadcasting rules by omitting to mention that the narrator of a programme about Gaza was the offspring of a Hamas administrator, according to UK media regulator Ofcom.
An investigation by the broadcasting watchdog into Gaza: How to Survive a Warzone has found that the film was "significantly deceptive".
The chief executive of the broadcaster had previously apologised, saying there had been "a significant failing in relation to accuracy".
The regulator has instructed the broadcaster to air a prime-time announcement about its findings.
"Since this amounts to a major infringement of our code, we are instructing the corporation to broadcast a statement of our determinations against it on BBC Two at 9pm, with a timing to be confirmed," the statement read.
'Risk to Undermine Confidence'
The authority's announcement stated: "Our investigation determined that the film's failure to disclose that the presenter's parent occupied a post in the Hamas-administered administration was materially misleading.
"Consequently that the audience did not have critical information which may have been very significant to their judgment of the presenter and the content he presented.
"Confidence is at the heart of the relationship between a television network and its audience, especially for a public service broadcaster such as the BBC.
"This error had the possibility to erode the very considerable degrees of credibility that audiences would have invested in a documentary produced by the BBC about the Gaza conflict."
The programme was withdrawn from iPlayer in February after the narrator's family links came to light, and in the month of July an broadcaster's internal assessment found it breached the broadcaster's content policies on factual correctness.
A representative for the broadcaster commented: "The authority's determination is in line with the conclusions of the corporation's inquiry, that there was a significant failing in the programme in relation to the corporation's content standards on accuracy, which aligns with Rule 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we agree with the authority's determination in its entirety. We will comply with the directive as soon as the schedule and language are confirmed."
