The public service broadcaster was found to have committed a "significant breach" of media regulations by not revealing that the voice of a documentary about the Gaza conflict was the child of a Hamas representative, as determined by British broadcasting authority Ofcom.
An inquiry by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has found that the film was "significantly deceptive".
The head of the BBC had previously apologised, saying there had been "a serious error in relation to accuracy".
Ofcom has ordered the BBC to air a peak-time announcement about its decisions.
"As this represents a serious breach of our regulations, we are ordering the BBC to transmit a announcement of our conclusions against it on BBC2 at 21:00, with a schedule to be finalised," the statement read.
'Possibility to Undermine Credibility'
The watchdog's statement stated: "Our probe found that the film's omission to reveal that the voice's father held a role in the Hamas-administered authority was significantly deceptive.
"Consequently that the public did not have essential details which may have been extremely pertinent to their judgment of the narrator and the information he shared.
"Confidence is at the heart of the connection between a media organization and its audience, notably for a public service broadcaster such as the BBC.
"This failing had the possibility to undermine the very considerable amounts of confidence that audiences would have put in a factual film from the broadcaster about the conflict in Gaza."
The programme was withdrawn from the BBC's streaming service in last February after the presenter's family links came to light, and in the month of July an internal BBC review determined it violated the broadcaster's editorial guidelines on accuracy.
A BBC spokesperson commented: "The Ofcom ruling is in line with the conclusions of the corporation's inquiry, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on accuracy, which aligns with regulation 2.2 of the regulator's media standards.
"We issued an apology for this and we comply with the regulator's ruling in full. We will adhere to the sanction as soon as the date and wording are finalised."
