The public service broadcaster engaged in a "serious breach" of media regulations by not revealing that the voice of a film about Gaza was the offspring of a Hamas administrator, as determined by UK media regulator Ofcom.
An probe by Ofcom into the documentary titled Gaza: How to Survive a Warzone has concluded that the documentary was "substantially inaccurate".
The BBC's director general had previously apologised, noting there had been "a major oversight in relation to factual correctness".
Ofcom has directed the corporation to air a evening statement about its findings.
"Given this constitutes a major infringement of our code, we are ordering the corporation to transmit a message of our conclusions against it on BBC Two at 21:00, with a schedule to be determined," the regulator stated.
'Potential to Erode Credibility'
The regulator's announcement declared: "The inquiry we conducted determined that the film's omission to reveal that the narrator's male guardian served in a position in the Hamas-run administration was materially misleading.
"Consequently that the public did not have critical information which may have been very significant to their evaluation of the voice and the details he provided.
"Trust is at the core of the relationship between a television network and its audience, especially for a state-funded media outlet such as the public broadcaster.
"This error had the potential to undermine the very considerable degrees of credibility that viewers would have invested in a documentary produced by the BBC about the conflict in Gaza."
The film was withdrawn from the BBC's streaming service in the month of February after the narrator's family links were revealed, and in the month of July an broadcaster's internal assessment concluded it breached the organization's journalistic standards on factual correctness.
A corporation official said: "The regulator's decision is in agreement with the results of Peter Johnston's review, that there was a significant failing in the documentary in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to regulation 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we accept the regulator's ruling in its entirety. We will follow the directive as soon as the date and wording are finalised."
