The public service broadcaster engaged in a "major breach" of media regulations by not revealing that the presenter of a programme about Gaza was the offspring of a Hamas representative, according to UK media regulator Ofcom.
An probe by Ofcom into the programme Gaza: How to Survive a Warzone has concluded that the film was "substantially inaccurate".
The head of the BBC had already issued an apology, saying there had been "a significant failing in relation to accuracy".
Ofcom has directed the BBC to air a prime-time announcement about its conclusions.
"Since this amounts to a significant violation of our code, we are instructing the corporation to transmit a announcement of our determinations against it on BBC Two at 21:00, with a date to be confirmed," it said.
'Risk to Undermine Confidence'
The authority's report said: "Our investigation found that the documentary's failure to disclose that the presenter's male guardian served in a role in the Hamas-run authority was significantly deceptive.
"This implied that the public did not have critical information which may have been extremely pertinent to their evaluation of the voice and the details he shared.
"Trust is at the core of the relationship between a media organization and its viewers, notably for a state-funded media outlet such as the public broadcaster.
"This error had the possibility to damage the exceptionally strong degrees of credibility that the public would have placed in a factual film from the broadcaster about the Israel-Gaza war."
The film was withdrawn from the online platform in the month of February after the presenter's personal associations came to light, and in this past July an corporation's own inquiry found it violated the broadcaster's journalistic standards on truthfulness.
A representative for the broadcaster commented: "The regulator's decision is in line with the conclusions of the internal assessment, that there was a major oversight in the programme in relation to the BBC's Editorial Guidelines on accuracy, which aligns with clause 2.2 of the regulator's media standards.
"We issued an apology for this and we comply with the regulator's ruling in full. We will comply with the directive as soon as the schedule and wording are finalised."
