The BBC committed a "serious breach" of broadcasting rules by not revealing that the presenter of a programme about Gaza was the son of a Hamas representative, according to UK media regulator Ofcom.
An investigation by Ofcom into the programme Gaza: How to Survive a Warzone has determined that the film was "significantly deceptive".
The chief executive of the broadcaster had previously apologised, stating there had been "a significant failing in relation to truthfulness".
The regulator has directed the corporation to air a peak-time statement about its conclusions.
"Given this constitutes a major infringement of our rules, we are ordering the broadcaster to broadcast a message of our findings against it on BBC Two at 9pm, with a schedule to be determined," it said.
'Risk to Undermine Credibility'
The regulator's report stated: "Our investigation concluded that the documentary's omission to reveal that the narrator's parent occupied a post in the Hamas-run government was materially misleading.
"This implied that the public did not have essential details which may have been extremely pertinent to their judgment of the voice and the content he presented.
"Credibility is at the core of the relationship between a media organization and its public, notably for a state-funded media outlet such as the British Broadcasting Corporation.
"This oversight had the potential to damage the very considerable amounts of confidence that audiences would have put in a BBC factual programme about the Israel-Gaza war."
The film was removed from iPlayer in February after the boy's personal associations emerged, and in this past July an corporation's own inquiry concluded it breached the broadcaster's content policies on factual correctness.
A corporation official commented: "The Ofcom ruling is in accordance with the conclusions of the corporation's inquiry, that there was a significant failing in the documentary in relation to the broadcaster's journalistic policies on factual correctness, which corresponds to regulation 2.2 of the regulator's media standards.
"We have apologised for this and we comply with the authority's determination in its entirety. We will adhere to the penalty as soon as the date and wording are determined."
