The British broadcaster was found to have committed a "significant breach" of industry standards by not revealing that the presenter of a programme about the Gaza situation was the child of a Hamas administrator, as ruled by UK media regulator Ofcom.
An inquiry by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the documentary was "significantly deceptive".
The BBC's director general had already issued an apology, stating there had been "a major oversight in relation to factual correctness".
The regulator has ordered the BBC to transmit a prime-time declaration about its conclusions.
"Given this constitutes a serious breach of our regulations, we are instructing the corporation to air a message of our determinations against it on the BBC's second channel at 21:00, with a schedule to be finalised," the regulator stated.
'Possibility to Damage Confidence'
The authority's report declared: "The inquiry we conducted concluded that the documentary's omission to reveal that the voice's father served in a role in the Hamas-run authority was significantly deceptive.
"This implied that the viewers did not have vital facts which may have been extremely pertinent to their judgment of the presenter and the details he presented.
"Confidence is at the center of the relationship between a television network and its audience, notably for a national broadcasting corporation such as the British Broadcasting Corporation.
"This error had the possibility to undermine the exceptionally strong amounts of trust that viewers would have invested in a documentary produced by the BBC about the Gaza conflict."
The film was removed from the BBC's streaming service in February after the presenter's family links came to light, and in the month of July an broadcaster's internal assessment concluded it violated the corporation's journalistic standards on accuracy.
A corporation official said: "The Ofcom ruling is in accordance with the results of the corporation's inquiry, that there was a serious error in the film in relation to the corporation's content standards on truthfulness, which reflects Rule 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we comply with Ofcom's decision in complete. We will comply with the penalty as soon as the schedule and language are finalised."
