The British broadcaster was found to have committed a "major breach" of media regulations by not revealing that the narrator of a documentary about Gaza was the offspring of a Hamas official, according to regulatory body Ofcom.
An investigation by the broadcasting watchdog into Gaza: How to Survive a Warzone has determined that the programme was "materially misleading".
The chief executive of the broadcaster had earlier expressed regret, stating there had been "a major oversight in relation to truthfulness".
The authority has directed the broadcaster to air a evening statement about its findings.
"As this represents a significant violation of our code, we are directing the broadcaster to air a statement of our determinations against it on BBC Two at 21:00, with a timing to be finalised," the statement read.
'Risk to Erode Credibility'
The regulator's announcement declared: "The inquiry we conducted found that the film's lack of disclosure that the voice's father occupied a post in the Hamas-administered government was substantially inaccurate.
"This implied that the audience did not have essential details which may have been highly relevant to their judgment of the voice and the information he shared.
"Confidence is at the core of the bond between a television network and its viewers, particularly for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the risk to undermine the significantly high amounts of trust that viewers would have invested in a BBC factual programme about the Israel-Gaza war."
The film was removed from the online platform in February after the narrator's familial connections were revealed, and in the month of July an corporation's own inquiry determined it violated the corporation's journalistic standards on truthfulness.
A representative for the broadcaster stated: "The Ofcom ruling is in accordance with the findings of the corporation's inquiry, that there was a serious error in the documentary in relation to the corporation's content standards on accuracy, which aligns with Rule 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we agree with the authority's determination in full. We will comply with the sanction as soon as the date and wording are confirmed."
