The British broadcaster committed a "significant breach" of media regulations by not revealing that the voice of a film about the Gaza conflict was the offspring of a Hamas administrator, as determined by UK media regulator Ofcom.
An investigation by Ofcom into the programme Gaza: How to Survive a Warzone has concluded that the programme was "substantially inaccurate".
The BBC's director general had already issued an apology, noting there had been "a significant failing in relation to truthfulness".
The authority has ordered the corporation to air a prime-time announcement about its conclusions.
"Since this amounts to a significant violation of our regulations, we are instructing the broadcaster to transmit a announcement of our determinations against it on the BBC's second channel at 21:00, with a timing to be confirmed," the regulator stated.
'Possibility to Undermine Credibility'
The authority's announcement stated: "The inquiry we conducted found that the film's failure to disclose that the narrator's male guardian held a position in the Hamas-run authority was substantially inaccurate.
"It meant that the public did not have vital facts which may have been extremely pertinent to their assessment of the narrator and the details he presented.
"Credibility is at the heart of the relationship between a broadcaster and its viewers, particularly for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the potential to erode the very considerable levels of credibility that the public would have put in a factual film from the broadcaster about the Gaza conflict."
The documentary was pulled from iPlayer in the month of February after the presenter's personal associations emerged, and in July an corporation's own inquiry found it breached the corporation's editorial guidelines on truthfulness.
A BBC spokesperson stated: "The authority's determination is in accordance with the conclusions of the internal assessment, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on truthfulness, which aligns with Rule 2.2 of the regulator's media standards.
"We have apologised for this and we comply with the regulator's ruling in complete. We will adhere to the directive as soon as the timing and language are confirmed."
