The BBC was found to have committed a "major breach" of broadcasting rules by failing to disclose that the voice of a programme about the Gaza situation was the child of a Hamas official, as determined by British broadcasting authority Ofcom.
An inquiry by the media regulator into Gaza: How to Survive a Warzone has concluded that the documentary was "materially misleading".
The BBC's director general had earlier expressed regret, stating there had been "a significant failing in relation to accuracy".
The authority has ordered the broadcaster to broadcast a prime-time announcement about its conclusions.
"Since this amounts to a significant violation of our regulations, we are ordering the corporation to transmit a statement of our conclusions against it on the BBC's second channel at 9pm, with a date to be finalised," it said.
'Possibility to Damage Credibility'
The watchdog's statement stated: "The inquiry we conducted found that the programme's omission to reveal that the presenter's parent served in a position in the Hamas-controlled authority 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.
"Confidence is at the core of the relationship between a television network and its viewers, particularly for a state-funded media outlet such as the BBC.
"This failing had the risk to erode the exceptionally strong degrees of credibility that viewers would have put in a documentary produced by the BBC about the conflict in Gaza."
The documentary was pulled from the online platform in last February after the presenter's personal associations came to light, and in the month of July an broadcaster's internal assessment found it infringed the organization's content policies on accuracy.
A representative for the broadcaster stated: "The Ofcom ruling is in line 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 reflects Rule 2.2 of the regulator's media standards.
"We issued an apology for this and we agree with the regulator's ruling in complete. We will comply with the directive as soon as the schedule and language are confirmed."
