The public service broadcaster engaged in a "serious breach" of industry standards by not revealing 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 broadcasting watchdog into the programme Gaza: How to Survive a Warzone has found that the documentary was "materially misleading".
The BBC's director general had already issued an apology, noting there had been "a serious error in relation to factual correctness".
The regulator has ordered the BBC to transmit a peak-time statement about its findings.
"Given this constitutes a serious breach of our code, we are directing the broadcaster to air a statement of our determinations against it on the BBC's second channel at 9pm, with a timing to be confirmed," the regulator stated.
'Possibility to Undermine Confidence'
The authority's announcement stated: "Our probe found that the programme's omission to reveal that the narrator's father held a position in the Hamas-controlled authority was substantially inaccurate.
"Consequently that the audience did not have essential details which may have been extremely pertinent to their evaluation of the presenter and the information he shared.
"Trust is at the heart of the connection between a media organization and its audience, particularly for a public service broadcaster such as the BBC.
"This error had the potential to damage the exceptionally strong amounts of credibility that viewers would have invested in a factual film from the broadcaster about the Israel-Gaza war."
The documentary was withdrawn from the online platform in February after the narrator's family links emerged, and in July an internal BBC review concluded it infringed the broadcaster's journalistic standards on accuracy.
A BBC spokesperson commented: "The authority's determination is in accordance with the conclusions of the internal assessment, that there was a significant failing in the documentary in relation to the broadcaster's journalistic policies on accuracy, which corresponds to regulation 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we accept the authority's determination in full. We will follow the directive as soon as the timing and language are confirmed."
