The public service broadcaster committed a "serious breach" of media regulations by omitting to mention that the narrator of a film about Gaza was the offspring of a Hamas official, as ruled by UK media regulator Ofcom.
An probe by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has found that the documentary was "significantly deceptive".
The chief executive of the broadcaster had earlier expressed regret, saying there had been "a serious error in relation to truthfulness".
The regulator has directed the BBC to transmit a peak-time declaration about its findings.
"Since this amounts to a significant violation of our rules, we are ordering the BBC to transmit a statement of our conclusions against it on the BBC's second channel at 21:00, with a schedule to be confirmed," it said.
'Potential to Erode Confidence'
The authority's announcement stated: "Our probe concluded that the film's lack of disclosure that the narrator's parent held a position in the Hamas-controlled authority was significantly deceptive.
"Consequently that the audience did not have critical information which may have been highly relevant to their assessment of the presenter and the information he provided.
"Confidence is at the core of the relationship between a television network and its audience, particularly for a public service broadcaster such as the British Broadcasting Corporation.
"This failing had the possibility to erode the exceptionally strong degrees of confidence that viewers would have invested in a BBC factual programme about the Israel-Gaza war."
The film was removed from the online platform in February after the narrator's family links came to light, and in the month of July an broadcaster's internal assessment concluded it breached the broadcaster's journalistic standards on truthfulness.
A corporation official commented: "The Ofcom ruling is in accordance with the findings of Peter Johnston's review, that there was a serious error in the programme in relation to the BBC's Editorial Guidelines on accuracy, which corresponds to clause 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we comply with the authority's determination in its entirety. We will comply with the sanction as soon as the date and wording are finalised."
