The public service broadcaster committed a "serious breach" of broadcasting rules by not revealing that the presenter of a programme about the Gaza conflict was the offspring of a Hamas administrator, as ruled by British broadcasting authority Ofcom.
An investigation by the media regulator into the documentary titled Gaza: How to Survive a Warzone has concluded that the documentary was "significantly deceptive".
The chief executive of the broadcaster had already issued an apology, saying there had been "a major oversight in relation to factual correctness".
The regulator has ordered the BBC to air a evening declaration about its conclusions.
"Given this constitutes a serious breach of our code, we are instructing the broadcaster to broadcast a statement of our findings against it on the BBC's second channel at 9pm, with a schedule to be finalised," it said.
'Possibility to Damage Trust'
The authority's announcement stated: "Our investigation concluded that the programme's lack of disclosure that the voice's parent served in a role in the Hamas-administered administration was materially misleading.
"This implied that the public did not have vital facts which may have been very significant to their assessment of the presenter and the details he shared.
"Trust is at the heart of the bond between a television network and its public, especially for a national broadcasting corporation such as the BBC.
"This error had the potential to undermine the significantly high amounts of trust that viewers would have placed in a documentary produced by the BBC about the conflict in Gaza."
The film was withdrawn from the BBC's streaming service in the month of February after the narrator's family links emerged, and in this past July an broadcaster's internal assessment found it infringed the broadcaster's content policies on accuracy.
A corporation official stated: "The regulator's decision is in line with the conclusions of the internal assessment, that there was a serious error in the film in relation to the corporation's content standards on truthfulness, which aligns with regulation 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we comply with the regulator's ruling in its entirety. We will follow the sanction as soon as the schedule and wording are finalised."
