The BBC engaged in a "significant breach" of broadcasting rules by failing to disclose that the voice of a documentary about Gaza was the offspring of a Hamas official, according to UK media regulator Ofcom.
An investigation by the media regulator into the documentary titled Gaza: How to Survive a Warzone has determined that the film was "significantly deceptive".
The BBC's director general had previously apologised, stating there had been "a major oversight in relation to accuracy".
The authority has ordered the corporation to transmit a prime-time statement about its findings.
"Given this constitutes a significant violation of our code, we are instructing the BBC to broadcast a statement of our conclusions against it on the BBC's second channel at 21:00, with a timing to be finalised," it said.
'Risk to Erode Credibility'
The authority's statement declared: "Our investigation determined that the film's lack of disclosure that the presenter's father occupied a post in the Hamas-controlled authority was significantly deceptive.
"It meant that the viewers did not have critical information which may have been highly relevant to their judgment of the voice and the information he provided.
"Confidence is at the heart of the relationship between a television network and its public, particularly for a state-funded media outlet such as the public broadcaster.
"This error had the potential to undermine the significantly high levels of confidence that the public would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The film was withdrawn from iPlayer in the month of February after the narrator's familial connections came to light, and in July an internal BBC review concluded it infringed the corporation's journalistic standards on factual correctness.
A representative for the broadcaster stated: "The authority's determination is in line with the results of Peter Johnston's review, that there was a major oversight in the film in relation to the corporation's content standards on accuracy, which reflects Rule 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we accept Ofcom's decision in its entirety. We will comply with the sanction as soon as the date and wording are determined."
