The British broadcaster committed a "significant breach" of broadcasting rules by not revealing that the voice of a programme about the Gaza situation was the child of a Hamas official, according to British broadcasting authority Ofcom.
An inquiry by the media regulator into the programme Gaza: How to Survive a Warzone has found that the documentary was "materially misleading".
The chief executive of the broadcaster had already issued an apology, stating there had been "a major oversight in relation to truthfulness".
The authority has instructed the broadcaster to air a prime-time statement about its decisions.
"Since this amounts to a significant violation of our rules, we are directing the corporation to transmit a announcement of our findings against it on BBC Two at nine o'clock in the evening, with a schedule to be finalised," the regulator stated.
'Risk to Undermine Credibility'
The regulator's announcement declared: "Our investigation found that the film's lack of disclosure that the presenter's parent occupied a position in the Hamas-administered administration was materially misleading.
"This implied that the viewers did not have essential details which may have been highly relevant to their assessment of the voice and the details he shared.
"Credibility is at the center of the bond between a broadcaster and its viewers, notably for a national broadcasting corporation such as the British Broadcasting Corporation.
"This error had the risk to damage the very considerable levels of confidence that viewers would have placed in a documentary produced by the BBC about the Israel-Gaza war."
The documentary was withdrawn from iPlayer in the month of February after the narrator's familial connections were revealed, and in the month of July an corporation's own inquiry concluded it violated the broadcaster's journalistic standards on accuracy.
A BBC spokesperson said: "The Ofcom ruling is in accordance with the results of the corporation's inquiry, that there was a significant failing in the documentary in relation to the BBC's Editorial Guidelines on accuracy, which reflects clause 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we comply with the authority's determination in full. We will adhere to the penalty as soon as the timing and wording are determined."
