The BBC engaged in a "major breach" of industry standards by omitting to mention that the voice of a programme about Gaza was the child of a Hamas representative, as determined by UK media regulator Ofcom.
An probe by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has concluded that the documentary was "materially misleading".
The head of the BBC had already issued an apology, noting there had been "a serious error in relation to factual correctness".
The regulator has ordered the corporation to transmit a peak-time statement about its conclusions.
"Since this amounts to a major infringement of our code, we are ordering the broadcaster to transmit a announcement of our determinations against it on BBC Two at nine o'clock in the evening, with a date to be finalised," the statement read.
'Risk to Undermine Confidence'
The authority's report said: "Our probe determined that the programme's failure to disclose that the presenter's parent served in a post in the Hamas-controlled government was materially misleading.
"This implied that the audience did not have vital facts which may have been highly relevant to their assessment of the voice and the information he presented.
"Confidence is at the core of the bond between a media organization and its audience, notably for a public service broadcaster such as the public broadcaster.
"This error had the possibility to undermine the significantly high degrees of confidence that viewers would have placed in a BBC factual programme about the Israel-Gaza war."
The documentary was withdrawn from the BBC's streaming service in the month of February after the presenter's family links emerged, and in this past July an corporation's own inquiry concluded it violated the corporation's editorial guidelines on accuracy.
A BBC spokesperson said: "The authority's determination is in agreement with the conclusions of the corporation's inquiry, that there was a major oversight in the documentary in relation to the corporation's content standards on accuracy, which aligns with clause 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept the authority's determination in full. We will follow the sanction as soon as the date and wording are determined."
