The British broadcaster was found to have committed a "serious breach" of broadcasting rules by failing to disclose that the presenter of a film about the Gaza situation was the son of a Hamas representative, as ruled by British broadcasting authority Ofcom.
An probe by the broadcasting watchdog into Gaza: How to Survive a Warzone has found that the film was "materially misleading".
The head of the BBC had previously apologised, saying there had been "a serious error in relation to factual correctness".
Ofcom has instructed the corporation to broadcast a prime-time announcement about its conclusions.
"Since this amounts to a major infringement of our rules, we are directing the broadcaster to transmit a statement of our findings against it on BBC2 at 21:00, with a date to be finalised," it said.
'Risk to Erode Credibility'
The watchdog's statement stated: "The inquiry we conducted concluded that the film's omission to reveal that the narrator's male guardian held a role in the Hamas-administered administration was substantially inaccurate.
"It meant that the viewers did not have essential details which may have been highly relevant to their assessment of the voice and the details he provided.
"Credibility is at the core 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 risk to erode the very considerable amounts of confidence that viewers would have invested in a BBC factual programme about the Gaza conflict."
The film was withdrawn from the online platform in the month of February after the presenter's family links came to light, and in the month of July an corporation's own inquiry concluded it breached the organization's editorial guidelines on truthfulness.
A corporation official commented: "The Ofcom ruling is in agreement with the findings of Peter Johnston's review, that there was a serious error in the film in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to regulation 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we accept the regulator's ruling in complete. We will comply with the directive as soon as the date and wording are finalised."
