The public service broadcaster committed a "major breach" of media regulations by failing to disclose that the presenter of a film about Gaza was the child of a Hamas representative, according to UK media regulator Ofcom.
An investigation by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has concluded that the film was "materially misleading".
The BBC's director general had already issued an apology, saying there had been "a serious error in relation to accuracy".
The regulator has ordered the BBC to broadcast a evening declaration about its decisions.
"Since this amounts to a significant violation of our code, we are ordering the broadcaster to broadcast a statement of our findings against it on BBC Two at 21:00, with a date to be determined," it said.
'Potential to Damage Confidence'
The authority's statement declared: "Our investigation determined that the film's omission to reveal that the narrator's male guardian occupied a post in the Hamas-controlled authority was significantly deceptive.
"This implied that the viewers did not have essential details which may have been highly relevant to their evaluation of the narrator and the details he presented.
"Credibility is at the heart of the connection between a television network and its public, notably for a national broadcasting corporation such as the BBC.
"This error had the potential to undermine the exceptionally strong amounts of confidence that the public would have put in a BBC factual programme about the Gaza conflict."
The film was withdrawn from the BBC's streaming service in the month of February after the narrator's familial connections emerged, and in July an broadcaster's internal assessment concluded it breached the corporation's journalistic standards on truthfulness.
A representative for the broadcaster commented: "The Ofcom ruling is in line with the findings of the corporation's inquiry, that there was a major oversight in the film in relation to the corporation's content standards on truthfulness, which corresponds to Rule 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we accept the authority's determination in complete. We will adhere to the sanction as soon as the schedule and wording are finalised."
