The BBC engaged in a "significant breach" of industry standards by omitting to mention that the voice of a film about Gaza was the offspring of a Hamas representative, as determined by UK media regulator Ofcom.
An investigation by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has determined that the film was "significantly deceptive".
The chief executive of the broadcaster had earlier expressed regret, saying there had been "a major oversight in relation to accuracy".
The regulator has directed the broadcaster to transmit a evening announcement about its conclusions.
"Given this constitutes a major infringement of our code, we are ordering the BBC to broadcast a announcement of our findings against it on the BBC's second channel at 21:00, with a timing to be determined," the statement read.
'Potential to Damage Confidence'
The watchdog's announcement stated: "Our probe determined that the programme's failure to disclose that the narrator's parent served in a position in the Hamas-controlled authority was substantially inaccurate.
"This implied that the audience did not have critical information which may have been highly relevant to their assessment of the voice and the details he shared.
"Trust is at the core of the relationship between a media organization and its audience, especially for a national broadcasting corporation such as the British Broadcasting Corporation.
"This failing had the potential to damage the exceptionally strong amounts of credibility that viewers would have placed in a documentary produced by the BBC about the Gaza conflict."
The documentary was withdrawn from the online platform in the month of February after the presenter's family links were revealed, and in July an broadcaster's internal assessment determined it violated the broadcaster's journalistic standards on accuracy.
A BBC spokesperson stated: "The Ofcom ruling is in line with the findings 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 authority's broadcasting regulations.
"We expressed regret for this and we agree with the regulator's ruling in full. We will follow the penalty as soon as the date and wording are finalised."
