The British broadcaster committed a "serious breach" of broadcasting rules by failing to disclose that the presenter of a programme about the Gaza conflict was the offspring of a Hamas official, according to regulatory body Ofcom.
An inquiry by the media regulator into the programme Gaza: How to Survive a Warzone has concluded that the documentary was "significantly deceptive".
The chief executive of the broadcaster had previously apologised, saying there had been "a major oversight in relation to accuracy".
The authority has directed the BBC to air a peak-time declaration about its conclusions.
"Since this amounts to a significant violation of our rules, we are ordering the BBC to air a announcement of our determinations against it on the BBC's second channel at nine o'clock in the evening, with a date to be confirmed," the regulator stated.
'Risk to Erode Confidence'
The watchdog's report declared: "Our investigation determined that the film's lack of disclosure that the narrator's father served in a role in the Hamas-controlled administration was significantly deceptive.
"Consequently that the public did not have vital facts which may have been very significant to their assessment of the narrator and the content he provided.
"Credibility is at the heart of the relationship between a media organization and its public, especially for a public service broadcaster such as the public broadcaster.
"This error had the risk to undermine the very considerable degrees of confidence that audiences would have invested in a factual film from the broadcaster about the Israel-Gaza war."
The documentary was removed from iPlayer in the month of February after the narrator's family links emerged, and in July an broadcaster's internal assessment found it infringed the organization's content policies on accuracy.
A representative for the broadcaster stated: "The authority's determination is in accordance with the findings of the corporation's inquiry, that there was a significant failing in the film in relation to the BBC's Editorial Guidelines on truthfulness, which aligns with Rule 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we comply with the regulator's ruling in full. We will follow the directive as soon as the timing and language are confirmed."
