The public service broadcaster was found to have committed a "serious breach" of media regulations by not revealing that the narrator of a programme about the Gaza situation was the offspring of a Hamas administrator, as determined by British broadcasting authority Ofcom.
An probe by Ofcom into the documentary titled Gaza: How to Survive a Warzone has found that the documentary was "significantly deceptive".
The chief executive of the broadcaster had earlier expressed regret, stating there had been "a serious error in relation to accuracy".
The regulator has instructed the broadcaster to transmit a prime-time statement about its findings.
"As this represents a serious breach of our rules, we are ordering the corporation to broadcast a announcement of our determinations against it on BBC Two at 21:00, with a schedule to be finalised," it said.
'Potential to Undermine Confidence'
The regulator's statement said: "The inquiry we conducted concluded that the documentary's failure to disclose that the voice's father served in a role in the Hamas-controlled administration was significantly deceptive.
"It meant that the audience did not have vital facts which may have been very significant to their judgment of the voice and the details he shared.
"Trust is at the heart of the bond between a media organization and its audience, notably for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the possibility to undermine the very considerable amounts of trust that the public would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The film was pulled from the online platform in February after the presenter's family links emerged, and in July an corporation's own inquiry concluded it breached the organization's content policies on truthfulness.
A representative for the broadcaster said: "The authority's determination is in line with the conclusions of Peter Johnston's review, that there was a serious error in the programme in relation to the broadcaster's journalistic policies on truthfulness, which reflects regulation 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we comply with Ofcom's decision in full. We will follow the penalty as soon as the date and wording are confirmed."
