The public service broadcaster engaged in a "major breach" of media regulations by omitting to mention that the voice of a documentary about the Gaza conflict was the child of a Hamas administrator, as ruled by UK media regulator Ofcom.
An investigation by the media regulator into the programme Gaza: How to Survive a Warzone has concluded that the programme was "materially misleading".
The chief executive of the broadcaster had earlier expressed regret, noting there had been "a serious error in relation to factual correctness".
The regulator has instructed the corporation to air a peak-time declaration about its findings.
"Given this constitutes a serious breach of our rules, we are directing the BBC to air a announcement of our findings against it on BBC2 at 21:00, with a date to be determined," the regulator stated.
'Possibility to Erode Trust'
The watchdog's report stated: "The inquiry we conducted found that the programme's omission to reveal that the presenter's father occupied a post in the Hamas-run administration was substantially inaccurate.
"This implied that the audience did not have vital facts which may have been very significant to their assessment of the narrator and the details he provided.
"Confidence is at the core of the bond between a media organization and its public, notably for a public service broadcaster such as the British Broadcasting Corporation.
"This oversight had the risk to undermine the very considerable levels of credibility that audiences would have put 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The film was withdrawn from the BBC's streaming service in last February after the boy's familial connections came to light, and in July an corporation's own inquiry found it infringed the corporation's editorial guidelines on truthfulness.
A representative for the broadcaster said: "The Ofcom ruling is in agreement with the findings of Peter Johnston's review, that there was a serious error in the programme in relation to the broadcaster's journalistic policies on truthfulness, which reflects clause 2.2 of the regulator's media standards.
"We expressed regret for this and we accept Ofcom's decision in its entirety. We will follow the directive as soon as the timing and wording are finalised."
