The British broadcaster was found to have committed a "major breach" of media regulations by not revealing that the narrator of a documentary about Gaza was the offspring of a Hamas official, as determined by UK media regulator Ofcom.
An inquiry by Ofcom into the programme Gaza: How to Survive a Warzone has determined that the film was "materially misleading".
The chief executive of the broadcaster had earlier expressed regret, noting there had been "a serious error in relation to accuracy".
Ofcom has ordered the BBC to air a prime-time announcement about its decisions.
"Given this constitutes a serious breach of our code, we are instructing the broadcaster to transmit a message of our determinations against it on BBC2 at 9pm, with a timing to be confirmed," the statement read.
'Potential to Undermine Confidence'
The regulator's statement stated: "The inquiry we conducted concluded that the programme's failure to disclose that the voice's male guardian held a post in the Hamas-administered administration was significantly deceptive.
"This implied that the viewers did not have vital facts which may have been extremely pertinent to their assessment of the voice and the information he provided.
"Credibility is at the heart of the relationship between a media organization and its viewers, particularly for a public service broadcaster such as the BBC.
"This error had the risk to undermine the very considerable levels of credibility that viewers would have invested in a documentary produced by the BBC about the Gaza conflict."
The film was pulled from the online platform in February after the presenter's familial connections emerged, and in July an broadcaster's internal assessment determined it infringed the corporation's journalistic standards on accuracy.
A representative for the broadcaster said: "The authority's determination is in line with the results of the internal assessment, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to clause 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we comply with Ofcom's decision in its entirety. We will follow the directive as soon as the timing and wording are confirmed."
