The public service broadcaster committed a "significant breach" of broadcasting rules by not revealing that the presenter of a film about the Gaza conflict was the offspring of a Hamas official, as determined by UK media regulator Ofcom.
An investigation by Ofcom 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 major oversight in relation to accuracy".
Ofcom has ordered the BBC to air a prime-time announcement about its decisions.
"Given this constitutes a significant violation of our rules, we are instructing the corporation to air a announcement of our findings against it on BBC Two at nine o'clock in the evening, with a schedule to be finalised," it said.
'Risk to Undermine Confidence'
The regulator's report declared: "Our probe concluded that the documentary's failure to disclose that the presenter's male guardian occupied a post in the Hamas-administered administration was materially misleading.
"It meant that the audience did not have critical information which may have been extremely pertinent to their judgment of the narrator and the content he presented.
"Confidence is at the core of the bond between a television network and its viewers, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the possibility to undermine the exceptionally strong levels of credibility that viewers would have put in a BBC factual programme about the conflict in Gaza."
The film was withdrawn from iPlayer in February after the narrator's family links were revealed, and in the month of July an internal BBC review determined it violated the broadcaster's journalistic standards on accuracy.
A corporation official commented: "The authority's determination is in line with the results of the corporation's inquiry, that there was a major oversight in the film in relation to the BBC's Editorial Guidelines on factual correctness, which corresponds to Rule 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we accept the authority's determination in complete. We will follow the directive as soon as the timing and language are confirmed."
