The public service broadcaster was found to have committed a "significant breach" of media regulations by failing to disclose that the presenter of a film about Gaza was the offspring of a Hamas representative, according to British broadcasting authority Ofcom.
An probe by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the film was "substantially inaccurate".
The BBC's director general had previously apologised, stating there had been "a serious error in relation to truthfulness".
The authority has ordered the BBC to broadcast a prime-time announcement about its findings.
"As this represents a significant violation of our regulations, we are instructing the BBC to air a statement of our determinations against it on BBC2 at nine o'clock in the evening, with a schedule to be confirmed," the regulator stated.
'Risk to Undermine Confidence'
The regulator's statement said: "Our probe determined that the film's lack of disclosure that the narrator's father served in a role in the Hamas-run authority was substantially inaccurate.
"This implied that the public did not have essential details which may have been very significant to their judgment of the presenter and the information he presented.
"Credibility is at the heart of the connection between a media organization and its audience, particularly for a national broadcasting corporation such as the BBC.
"This oversight had the risk to erode the very considerable degrees of credibility that the public would have invested in a factual film from the broadcaster about the conflict in Gaza."
The documentary was removed from the online platform in last February after the narrator's personal associations came to light, and in the month of July an corporation's own inquiry found it violated the corporation's content policies on factual correctness.
A representative for the broadcaster said: "The authority's determination is in agreement with the conclusions of the corporation's inquiry, that there was a significant failing in the documentary in relation to the corporation's content standards on truthfulness, which aligns with Rule 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we comply with Ofcom's decision in its entirety. We will adhere to the sanction as soon as the schedule and wording are determined."
