The BBC engaged in a "major breach" of media regulations by not revealing that the voice of a programme about Gaza was the offspring of a Hamas official, as ruled by British broadcasting authority Ofcom.
An inquiry by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has found that the film was "materially misleading".
The chief executive of the broadcaster had earlier expressed regret, noting there had been "a major oversight in relation to factual correctness".
Ofcom has ordered the corporation to transmit a prime-time announcement about its conclusions.
"As this represents a major infringement of our code, we are instructing the corporation to air a announcement of our findings against it on the BBC's second channel at 9pm, with a date to be determined," the regulator stated.
'Risk to Erode Confidence'
The authority's report stated: "The inquiry we conducted determined that the film's lack of disclosure that the voice's father occupied a position in the Hamas-run government was substantially inaccurate.
"This implied that the public did not have critical information which may have been extremely pertinent to their evaluation of the presenter and the content he shared.
"Confidence is at the heart of the bond between a media organization and its audience, particularly for a state-funded media outlet such as the BBC.
"This oversight had the risk to damage the exceptionally strong levels of confidence that the public would have placed in a BBC factual programme about the conflict in Gaza."
The documentary was pulled from the BBC's streaming service in the month of February after the presenter's family links were revealed, and in the month of July an corporation's own inquiry found it breached the corporation's editorial guidelines on truthfulness.
A representative for the broadcaster commented: "The regulator's decision is in accordance with the findings of the corporation's inquiry, that there was a major oversight in the programme in relation to the corporation's content standards on truthfulness, which corresponds to Rule 2.2 of the regulator's media standards.
"We expressed regret for this and we accept the authority's determination in its entirety. We will adhere to the directive as soon as the schedule and language are determined."
