The public service broadcaster engaged in a "significant breach" of media regulations by not revealing that the narrator of a programme about Gaza was the son of a Hamas official, according to UK media regulator Ofcom.
An probe by the media regulator into the programme Gaza: How to Survive a Warzone has found that the documentary was "significantly deceptive".
The head of the BBC had previously apologised, noting there had been "a major oversight in relation to truthfulness".
Ofcom has instructed the BBC to broadcast a peak-time announcement about its decisions.
"Since this amounts to a major infringement of our rules, we are directing the BBC to broadcast a announcement of our determinations against it on the BBC's second channel at nine o'clock in the evening, with a date to be finalised," the regulator stated.
'Risk to Undermine Trust'
The watchdog's announcement stated: "Our investigation concluded that the programme's omission to reveal that the narrator's parent served in a role in the Hamas-administered government was significantly deceptive.
"It meant that the audience did not have vital facts which may have been extremely pertinent to their evaluation of the voice and the content he provided.
"Confidence is at the core of the bond between a media organization and its audience, notably for a state-funded media outlet such as the public broadcaster.
"This oversight had the possibility to damage the exceptionally strong levels of credibility that viewers would have placed in a factual film from the broadcaster about the Israel-Gaza war."
The film was withdrawn from the online platform in last February after the presenter's family links were revealed, and in this past July an corporation's own inquiry determined it breached the organization's content policies on factual correctness.
A BBC spokesperson stated: "The Ofcom ruling is in line with the conclusions of Peter Johnston's review, that there was a significant failing in the documentary in relation to the BBC's Editorial Guidelines on truthfulness, which reflects Rule 2.2 of the regulator's media standards.
"We have apologised for this and we agree with Ofcom's decision in complete. We will follow the penalty as soon as the date and wording are finalised."
