The British broadcaster committed a "significant breach" of media regulations by omitting to mention that the narrator of a film about the Gaza conflict was the offspring of a Hamas representative, according to British broadcasting authority Ofcom.
An inquiry by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has determined that the film was "substantially inaccurate".
The BBC's director general had earlier expressed regret, noting there had been "a major oversight in relation to factual correctness".
The authority has ordered the corporation to air a evening statement about its decisions.
"As this represents a major infringement of our regulations, we are directing the corporation to air a announcement of our findings against it on the BBC's second channel at nine o'clock in the evening, with a timing to be confirmed," it said.
The authority's report declared: "Our probe determined that the film's omission to reveal that the presenter's parent served in a position in the Hamas-controlled government was significantly deceptive.
"Consequently that the audience did not have critical information which may have been highly relevant to their evaluation of the narrator and the content he shared.
"Credibility is at the core of the relationship between a television network and its viewers, notably for a national broadcasting corporation such as the BBC.
"This error had the potential to undermine the significantly high levels of confidence that the public would have invested in a factual film from the broadcaster about the Israel-Gaza war."
The film was withdrawn from the BBC's streaming service in last February after the boy's personal associations emerged, and in this past July an broadcaster's internal assessment found it infringed the corporation's journalistic standards on accuracy.
A representative for the broadcaster commented: "The authority's determination is in agreement with the conclusions of Peter Johnston's review, that there was a significant failing in the documentary in relation to the broadcaster's journalistic policies on accuracy, which corresponds to clause 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept the regulator's ruling in full. We will follow the directive as soon as the schedule and wording are finalised."
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