The public service broadcaster was found to have committed a "major breach" of industry standards by not revealing that the narrator of a programme about the Gaza conflict was the son of a Hamas representative, according to regulatory body Ofcom.
An investigation by the broadcasting watchdog into Gaza: How to Survive a Warzone has found that the programme was "substantially inaccurate".
The head of the BBC had earlier expressed regret, stating there had been "a serious error in relation to truthfulness".
The authority has instructed the BBC to air a evening declaration about its conclusions.
"As this represents a significant violation of our regulations, we are instructing the broadcaster to transmit a statement of our determinations against it on BBC2 at nine o'clock in the evening, with a date to be finalised," the statement read.
'Risk to Erode Trust'
The authority's statement said: "The inquiry we conducted found that the programme's omission to reveal that the presenter's male guardian occupied a role in the Hamas-controlled government was materially misleading.
"This implied that the viewers did not have critical information which may have been highly relevant to their judgment of the presenter and the details he shared.
"Credibility is at the center of the relationship between a media organization and its public, notably for a national broadcasting corporation such as the public broadcaster.
"This failing had the potential to undermine the significantly high levels of confidence that the public would have placed in a factual film from the broadcaster about the conflict in Gaza."
The documentary was removed from the online platform in February after the boy's personal associations were revealed, and in the month of July an corporation's own inquiry concluded it violated the corporation's journalistic standards on accuracy.
A representative for the broadcaster commented: "The authority's determination is in agreement with the results of the corporation's inquiry, that there was a significant failing in the film in relation to the broadcaster's journalistic policies on truthfulness, which reflects clause 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we comply with the authority's determination in full. We will comply with the directive as soon as the date and wording are finalised."
