The public service broadcaster committed a "significant breach" of broadcasting rules by failing to disclose that the presenter of a documentary about the Gaza conflict was the offspring of a Hamas representative, as ruled by regulatory body Ofcom.
An investigation by the broadcasting watchdog into Gaza: How to Survive a Warzone has determined that the programme was "materially misleading".
The head of the BBC had already issued an apology, noting there had been "a major oversight in relation to accuracy".
The regulator has directed the corporation to broadcast a evening declaration about its conclusions.
"As this represents a major infringement of our code, we are ordering the BBC to transmit a message of our conclusions against it on BBC2 at nine o'clock in the evening, with a timing to be finalised," the statement read.
'Risk to Erode Confidence'
The authority's announcement said: "The inquiry we conducted concluded that the programme's lack of disclosure that the presenter's male guardian occupied a post in the Hamas-controlled administration was substantially inaccurate.
"This implied that the viewers did not have critical information which may have been very significant to their assessment of the voice and the information he presented.
"Confidence is at the center of the bond between a television network and its public, notably for a national broadcasting corporation such as the British Broadcasting Corporation.
"This error had the possibility to damage the very considerable levels of trust that audiences would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The programme was pulled from iPlayer in February after the narrator's family links emerged, and in the month of July an internal BBC review concluded it breached the corporation's content policies on accuracy.
A representative for the broadcaster commented: "The Ofcom ruling is in accordance with the conclusions of the corporation's inquiry, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to Rule 2.2 of the regulator's media standards.
"We expressed regret for this and we agree with the regulator's ruling in complete. We will follow the directive as soon as the timing and language are finalised."
