The public service broadcaster committed a "serious breach" of broadcasting rules by not revealing that the presenter of a documentary about the Gaza conflict was the child of a Hamas representative, as determined by regulatory body Ofcom.
An inquiry by the media regulator into the programme Gaza: How to Survive a Warzone has concluded that the programme was "significantly deceptive".
The head of the BBC had earlier expressed regret, saying there had been "a major oversight in relation to truthfulness".
The authority has instructed the corporation to transmit a peak-time declaration about its conclusions.
"Since this amounts to a significant violation of our rules, we are ordering the BBC to transmit a statement of our determinations against it on BBC2 at 21:00, with a timing to be finalised," the statement read.
'Risk to Undermine Confidence'
The regulator's announcement declared: "Our investigation determined that the programme's omission to reveal that the voice's father occupied a position in the Hamas-run administration was significantly deceptive.
"Consequently that the audience did not have critical information which may have been very significant to their judgment of the voice and the information he presented.
"Credibility is at the center of the relationship between a television network and its audience, particularly for a national broadcasting corporation such as the BBC.
"This oversight had the potential to undermine the very considerable amounts of confidence that audiences would have put in a BBC factual programme about the Israel-Gaza war."
The programme was withdrawn from the BBC's streaming service in the month of February after the presenter's personal associations emerged, and in July an corporation's own inquiry concluded it breached the organization's editorial guidelines on accuracy.
A representative for the broadcaster said: "The regulator's decision is in line with the results of the internal assessment, that there was a major oversight in the film in relation to the BBC's Editorial Guidelines on accuracy, which aligns with Rule 2.2 of the regulator's media standards.
"We expressed regret for this and we agree with Ofcom's decision in complete. We will follow the penalty as soon as the schedule and language are finalised."
