The British broadcaster engaged in a "significant breach" of broadcasting rules by omitting to mention that the narrator of a film about the Gaza situation was the child of a Hamas representative, as ruled by UK media regulator Ofcom.
An investigation by the media regulator into the programme Gaza: How to Survive a Warzone has determined that the documentary was "materially misleading".
The head of the BBC had earlier expressed regret, stating there had been "a serious error in relation to truthfulness".
The regulator has ordered the corporation to air a evening declaration about its findings.
"As this represents a major infringement of our rules, we are ordering the corporation to transmit a statement of our conclusions against it on BBC2 at 21:00, with a timing to be confirmed," the statement read.
'Risk to Erode Credibility'
The watchdog's announcement said: "Our probe found that the programme's lack of disclosure that the presenter's father occupied a post in the Hamas-run authority was materially misleading.
"This implied that the viewers did not have vital facts which may have been very significant to their judgment of the presenter and the details he presented.
"Confidence is at the heart of the relationship between a broadcaster and its viewers, particularly for a national broadcasting corporation such as the public broadcaster.
"This failing had the possibility to erode the very considerable amounts of credibility that the public would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The film was withdrawn from the BBC's streaming service in February after the boy's familial connections came to light, and in July an corporation's own inquiry determined it breached the broadcaster's journalistic standards on accuracy.
A corporation official commented: "The authority's determination is in accordance with the findings of the internal assessment, that there was a serious error in the documentary in relation to the broadcaster's journalistic policies on factual correctness, which aligns with clause 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we comply with the authority's determination in full. We will comply with the directive as soon as the timing and wording are determined."
