The British broadcaster committed a "serious breach" of broadcasting rules by failing to disclose that the presenter of a film about Gaza was the child of a Hamas representative, as ruled by regulatory body Ofcom.
An inquiry by the media regulator into the documentary titled Gaza: How to Survive a Warzone has determined that the film was "significantly deceptive".
The chief executive of the broadcaster had earlier expressed regret, noting there had been "a serious error in relation to factual correctness".
Ofcom has instructed the broadcaster to air a prime-time announcement about its decisions.
"As this represents a major infringement of our code, we are directing the BBC to broadcast a statement of our determinations against it on BBC Two at 9pm, with a date to be finalised," it said.
'Risk to Erode Credibility'
The watchdog's statement said: "Our probe concluded that the film's omission to reveal that the presenter's male guardian served in a position in the Hamas-administered authority was significantly deceptive.
"Consequently that the audience did not have vital facts which may have been highly relevant to their assessment of the presenter and the details he presented.
"Trust is at the heart of the bond between a television network and its audience, especially for a public service broadcaster such as the BBC.
"This failing had the possibility to undermine the exceptionally strong levels of confidence that the public would have invested in a BBC factual programme about the conflict in Gaza."
The film was pulled from the online platform in the month of February after the boy's family links were revealed, and in this past July an broadcaster's internal assessment determined it breached the corporation's journalistic standards on truthfulness.
A BBC spokesperson said: "The authority's determination is in line with the conclusions of the internal assessment, that there was a serious error in the programme in relation to the broadcaster's journalistic policies on truthfulness, which aligns with regulation 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we agree with the authority's determination in full. We will comply with the sanction as soon as the timing and wording are finalised."
