The public service broadcaster committed a "major breach" of media regulations by not revealing that the presenter of a film about the Gaza conflict was the son of a Hamas official, as determined by regulatory body Ofcom.
An probe by the media regulator into the documentary titled Gaza: How to Survive a Warzone has concluded that the film was "significantly deceptive".
The chief executive of the broadcaster had already issued an apology, noting there had been "a serious error in relation to factual correctness".
The regulator has directed the corporation to air a peak-time declaration about its findings.
"Given this constitutes a major infringement of our code, we are directing the broadcaster to broadcast a announcement of our conclusions against it on BBC Two at nine o'clock in the evening, with a timing to be determined," it said.
'Risk to Erode Trust'
The regulator's report said: "Our investigation determined that the documentary's lack of disclosure that the voice's father served in a position in the Hamas-run authority was substantially inaccurate.
"Consequently that the viewers did not have critical information which may have been highly relevant to their assessment of the narrator and the information he presented.
"Credibility is at the center of the relationship between a media organization and its audience, particularly for a public service broadcaster such as the BBC.
"This oversight had the possibility to undermine the exceptionally strong amounts of trust that audiences would have invested in a BBC factual programme about the conflict in Gaza."
The film was removed from the online platform in the month of February after the narrator's familial connections emerged, and in the month of July an broadcaster's internal assessment determined it breached the corporation's content policies on factual correctness.
A corporation official commented: "The Ofcom ruling is in line with the results of Peter Johnston's review, that there was a significant failing in the programme in relation to the broadcaster's journalistic policies on truthfulness, which aligns with regulation 2.2 of the regulator's media standards.
"We expressed regret for this and we agree with the authority's determination in full. We will adhere to the directive as soon as the schedule and wording are determined."
