The BBC engaged in a "serious breach" of industry standards by failing to disclose that the voice of a film about Gaza was the offspring of a Hamas representative, according to UK media regulator Ofcom.
An inquiry by the media regulator into the documentary titled Gaza: How to Survive a Warzone has found that the programme was "materially misleading".
The BBC's director general had already issued an apology, stating there had been "a significant failing in relation to truthfulness".
The authority has instructed the corporation to broadcast a peak-time statement about its conclusions.
"Given this constitutes a serious breach of our rules, we are directing the BBC to broadcast a announcement of our findings against it on BBC Two at 9pm, with a date to be finalised," it said.
'Potential to Undermine Trust'
The regulator's announcement declared: "Our investigation found that the documentary's omission to reveal that the presenter's father served in a position in the Hamas-run administration was materially misleading.
"Consequently that the viewers did not have critical information which may have been extremely pertinent to their judgment of the presenter and the information he shared.
"Credibility is at the heart of the relationship between a television network and its audience, particularly for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the possibility to undermine the exceptionally strong degrees of trust that viewers would have put in a factual film from the broadcaster about the conflict in Gaza."
The documentary was withdrawn from the online platform in the month of February after the narrator's familial connections emerged, and in the month of July an broadcaster's internal assessment concluded it violated the organization's content policies on accuracy.
A representative for the broadcaster said: "The Ofcom ruling is in line with the findings of the corporation's inquiry, that there was a significant failing in the programme in relation to the BBC's Editorial Guidelines on factual correctness, which reflects regulation 2.2 of the regulator's media standards.
"We have apologised for this and we accept Ofcom's decision in its entirety. We will adhere to the sanction as soon as the date and wording are finalised."
