The public service broadcaster committed a "major breach" of industry standards by omitting to mention that the narrator of a film about the Gaza situation was the son of a Hamas administrator, according to UK media regulator Ofcom.
An inquiry by Ofcom into Gaza: How to Survive a Warzone has determined that the programme was "significantly deceptive".
The head of the BBC had previously apologised, noting there had been "a major oversight in relation to truthfulness".
The regulator has directed the BBC to transmit a prime-time announcement about its decisions.
"Since this amounts to a significant violation of our rules, we are directing the corporation to transmit a announcement of our conclusions against it on the BBC's second channel at 21:00, with a schedule to be finalised," the regulator stated.
'Risk to Erode Trust'
The authority's statement said: "The inquiry we conducted concluded that the film's failure to disclose that the voice's father held a post in the Hamas-controlled authority was substantially inaccurate.
"Consequently that the viewers did not have vital facts which may have been very significant to their judgment of the narrator and the content he provided.
"Confidence is at the core of the connection between a broadcaster and its viewers, particularly for a public service broadcaster such as the BBC.
"This oversight had the possibility to undermine the significantly high amounts of trust that viewers would have placed in a BBC factual programme about the Gaza conflict."
The programme was pulled from iPlayer in February after the narrator's family links came to light, and in the month of July an corporation's own inquiry found it breached the corporation's journalistic standards on accuracy.
A representative for the broadcaster said: "The Ofcom ruling is in accordance with the results of the corporation's inquiry, that there was a significant failing in the documentary in relation to the corporation's content standards on factual correctness, which corresponds to Rule 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we comply with Ofcom's decision in full. We will comply with the directive as soon as the timing and wording are confirmed."
