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 son of a Hamas representative, according to UK media regulator Ofcom.
An inquiry by the broadcasting watchdog into Gaza: How to Survive a Warzone has concluded that the documentary was "materially misleading".
The chief executive of the broadcaster had earlier expressed regret, noting there had been "a significant failing in relation to accuracy".
The authority has directed the broadcaster to transmit a evening statement about its conclusions.
"Since this amounts to a major infringement of our rules, we are directing the broadcaster to air a message of our findings against it on BBC2 at 9pm, with a date to be determined," the statement read.
'Potential to Damage Trust'
The authority's statement stated: "Our probe determined that the programme's lack of disclosure that the voice's father served in a post in the Hamas-run administration was materially misleading.
"This implied that the audience did not have vital facts which may have been highly relevant to their judgment of the voice and the content he shared.
"Credibility is at the center of the connection between a media organization and its audience, notably for a public service broadcaster such as the public broadcaster.
"This failing had the risk to damage the significantly high levels of trust that the public would have invested in a factual film from the broadcaster about the conflict in Gaza."
The programme was withdrawn from the online platform in February after the presenter's familial connections emerged, and in the month of July an corporation's own inquiry determined it infringed the broadcaster's editorial guidelines on truthfulness.
A representative for the broadcaster stated: "The Ofcom ruling is in accordance with the results of the internal assessment, that there was a serious error in the programme in relation to the broadcaster's journalistic policies on factual correctness, which corresponds to clause 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we accept the authority's determination in full. We will follow the penalty as soon as the date and language are confirmed."
