The public service broadcaster engaged in a "major breach" of media regulations by not revealing that the narrator of a documentary about Gaza was the son of a Hamas official, as determined by UK media regulator Ofcom.
An inquiry by Ofcom into the documentary titled Gaza: How to Survive a Warzone has concluded that the programme was "significantly deceptive".
The head of the BBC had previously apologised, saying there had been "a major oversight in relation to truthfulness".
The regulator has instructed the broadcaster to broadcast a evening statement about its decisions.
"As this represents a major infringement of our code, we are instructing the broadcaster to transmit a announcement of our conclusions against it on BBC2 at 21:00, with a timing to be finalised," it said.
'Possibility to Erode Confidence'
The regulator's statement said: "Our investigation determined that the documentary's omission to reveal that the voice's male guardian held a role in the Hamas-controlled authority was substantially inaccurate.
"It meant that the audience did not have critical information which may have been highly relevant to their judgment of the narrator and the information he shared.
"Trust is at the center of the bond between a media organization and its audience, particularly for a national broadcasting corporation such as the British Broadcasting Corporation.
"This oversight had the potential to erode the very considerable levels of credibility that the public would have put in a documentary produced by the BBC about the Israel-Gaza war."
The documentary was withdrawn from the online platform in February after the presenter's family links came to light, and in the month of July an corporation's own inquiry determined it violated the corporation's journalistic standards on factual correctness.
A corporation official said: "The regulator's decision is in accordance with the findings of the internal assessment, that there was a serious error in the film in relation to the BBC's Editorial Guidelines on factual correctness, which corresponds to regulation 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we agree with the regulator's ruling in full. We will comply with the sanction as soon as the date and wording are determined."
