The British broadcaster committed a "major breach" of broadcasting rules by omitting to mention that the presenter of a documentary about Gaza was the son of a Hamas representative, as ruled by British broadcasting authority Ofcom.
An inquiry by Ofcom into the programme Gaza: How to Survive a Warzone has found that the documentary was "significantly deceptive".
The head of the BBC had earlier expressed regret, stating there had been "a significant failing in relation to factual correctness".
Ofcom has ordered the broadcaster to transmit a peak-time announcement about its conclusions.
"As this represents a significant violation of our code, we are directing the BBC to air a announcement of our conclusions against it on the BBC's second channel at nine o'clock in the evening, with a schedule to be finalised," the statement read.
'Potential to Undermine Credibility'
The regulator's report said: "The inquiry we conducted determined that the film's omission to reveal that the narrator's male guardian served in a role in the Hamas-administered administration was significantly deceptive.
"This implied that the audience did not have vital facts which may have been highly relevant to their judgment of the presenter and the content he provided.
"Trust is at the core of the bond between a broadcaster and its audience, especially for a public service broadcaster such as the public broadcaster.
"This failing had the possibility to erode the very considerable levels of confidence that audiences would have put in a BBC factual programme about the Israel-Gaza war."
The film was withdrawn from the BBC's streaming service in the month of February after the boy's family links were revealed, and in this past July an internal BBC review found it violated the corporation's content policies on truthfulness.
A representative for the broadcaster commented: "The authority's determination is in agreement with the findings of the internal assessment, that there was a serious error in the programme in relation to the BBC's Editorial Guidelines on accuracy, which corresponds to regulation 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we comply with the authority's determination in complete. We will adhere to the sanction as soon as the date and wording are confirmed."
