The British broadcaster committed a "major breach" of media regulations by omitting to mention that the presenter of a film about the Gaza situation was the child of a Hamas administrator, as ruled by regulatory body Ofcom.
An inquiry by the media regulator into Gaza: How to Survive a Warzone has concluded that the film was "significantly deceptive".
The head of the BBC had earlier expressed regret, noting there had been "a major oversight in relation to factual correctness".
The authority has instructed the corporation to broadcast a peak-time statement about its decisions.
"Since this amounts to a serious breach of our code, we are directing the broadcaster to broadcast a announcement of our conclusions against it on BBC Two at 21:00, with a date to be determined," the statement read.
'Potential to Erode Credibility'
The regulator's announcement stated: "The inquiry we conducted determined that the programme's omission to reveal that the narrator's male guardian occupied a post in the Hamas-administered administration was materially misleading.
"This implied that the audience did not have critical information which may have been very significant to their judgment of the narrator and the details he shared.
"Credibility is at the core of the bond between a television network and its viewers, notably for a national broadcasting corporation such as the British Broadcasting Corporation.
"This oversight had the possibility to damage the exceptionally strong degrees of credibility that the public would have invested in a documentary produced by the BBC about the Gaza conflict."
The programme was pulled from the online platform in February after the presenter's family links came to light, and in July an corporation's own inquiry determined it violated the corporation's journalistic standards on truthfulness.
A representative for the broadcaster commented: "The Ofcom ruling is in agreement with the results of the internal assessment, that there was a major oversight in the documentary in relation to the corporation's content standards on factual correctness, which reflects clause 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we comply with the regulator's ruling in its entirety. We will follow the sanction as soon as the date and language are determined."
