The public service broadcaster committed a "major breach" of broadcasting rules by not revealing that the presenter of a documentary about the Gaza situation was the son of a Hamas representative, according to regulatory body Ofcom.
An investigation by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the film was "significantly deceptive".
The chief executive of the broadcaster had earlier expressed regret, noting there had been "a serious error in relation to factual correctness".
The regulator has directed the corporation to transmit a prime-time announcement about its decisions.
"Since this amounts to a significant violation of our regulations, we are directing the BBC to transmit 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 determined," the regulator stated.
'Possibility to Erode Confidence'
The authority's statement said: "Our probe concluded that the documentary's lack of disclosure that the voice's parent held a role in the Hamas-run government was significantly deceptive.
"Consequently that the audience did not have essential details which may have been extremely pertinent to their judgment of the presenter and the details he shared.
"Confidence is at the center of the connection between a media organization and its audience, particularly for a national broadcasting corporation such as the public broadcaster.
"This error had the possibility to undermine the very considerable degrees of confidence that viewers would have invested in a BBC factual programme about the Israel-Gaza war."
The programme was removed from iPlayer in the month of February after the boy's family links were revealed, and in July an corporation's own inquiry concluded it breached the corporation's editorial guidelines on accuracy.
A BBC spokesperson said: "The Ofcom ruling is in line with the findings of the corporation's inquiry, that there was a serious error in the documentary in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to Rule 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we accept the authority's determination in full. We will adhere to the penalty as soon as the timing and wording are confirmed."
