The BBC engaged in a "serious breach" of media regulations by not revealing that the voice of a documentary about the Gaza situation was the child of a Hamas official, according to UK media regulator Ofcom.
An probe by Ofcom into Gaza: How to Survive a Warzone has determined that the programme was "materially misleading".
The chief executive of the broadcaster had previously apologised, noting there had been "a significant failing in relation to factual correctness".
The regulator has directed the corporation to transmit a evening announcement about its decisions.
"As this represents a significant violation of our rules, we are ordering the broadcaster to broadcast a statement of our conclusions against it on the BBC's second channel at 9pm, with a date to be determined," it said.
'Risk to Damage Credibility'
The regulator's report stated: "The inquiry we conducted determined that the film's omission to reveal that the voice's parent served in a role in the Hamas-run government was materially misleading.
"It meant that the audience did not have critical information which may have been highly relevant to their assessment of the narrator and the details he shared.
"Credibility is at the center of the relationship between a media organization and its public, notably for a state-funded media outlet such as the BBC.
"This oversight had the potential to damage the significantly high degrees of confidence that audiences would have placed in a documentary produced by the BBC about the conflict in Gaza."
The programme was withdrawn from the BBC's streaming service in last February after the narrator's personal associations emerged, and in the month of July an internal BBC review concluded it breached the corporation's editorial guidelines on accuracy.
A BBC spokesperson said: "The regulator's decision is in agreement with the results of the internal assessment, that there was a significant failing in the documentary in relation to the corporation's content standards on accuracy, which corresponds to regulation 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we comply with the authority's determination in full. We will adhere to the directive as soon as the schedule and wording are finalised."
