The public service broadcaster committed a "major breach" of industry standards by not revealing that the narrator of a documentary about the Gaza situation was the offspring of a Hamas representative, as ruled by UK media regulator Ofcom.
An inquiry by the media regulator into Gaza: How to Survive a Warzone has concluded that the film was "materially misleading".
The chief executive of the broadcaster had earlier expressed regret, stating there had been "a major oversight in relation to factual correctness".
The authority has instructed the BBC to air a evening declaration about its findings.
"As this represents a serious breach of our regulations, we are ordering the BBC to transmit a announcement of our findings against it on BBC Two at 21:00, with a date to be finalised," the regulator stated.
'Risk to Damage Credibility'
The watchdog's report declared: "The inquiry we conducted concluded that the film's lack of disclosure that the presenter's male guardian occupied a role in the Hamas-controlled administration was substantially inaccurate.
"This implied that the audience did not have vital facts which may have been extremely pertinent to their judgment of the voice and the details he shared.
"Trust is at the core of the bond between a media organization and its audience, particularly for a state-funded media outlet such as the British Broadcasting Corporation.
"This oversight had the potential to erode the significantly high amounts of credibility that the public would have invested in a BBC factual programme about the Israel-Gaza war."
The documentary was pulled from the online platform in last February after the narrator's personal associations came to light, and in the month of July an broadcaster's internal assessment concluded it infringed the organization's content policies on accuracy.
A corporation official said: "The regulator's decision is in line with the results of Peter Johnston's review, that there was a significant failing in the film in relation to the broadcaster's journalistic policies on accuracy, which corresponds to Rule 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we accept the regulator's ruling in full. We will adhere to the sanction as soon as the timing and wording are determined."
