The BBC engaged in a "serious breach" of industry standards by not revealing that the presenter of a programme about the Gaza situation was the child of a Hamas representative, according to regulatory body Ofcom.
An inquiry by the media regulator into the programme Gaza: How to Survive a Warzone has found that the documentary was "significantly deceptive".
The chief executive of the broadcaster had previously apologised, stating there had been "a significant failing in relation to accuracy".
The regulator has ordered the BBC to broadcast a peak-time declaration about its findings.
"As this represents a major infringement of our code, we are ordering the BBC to air a message of our conclusions against it on BBC Two at nine o'clock in the evening, with a schedule to be confirmed," the regulator stated.
'Risk to Undermine Trust'
The authority's report stated: "The inquiry we conducted found that the film's omission to reveal that the narrator's father held a role in the Hamas-administered administration was substantially inaccurate.
"Consequently that the audience did not have critical information which may have been extremely pertinent to their assessment of the presenter and the details he shared.
"Confidence is at the heart of the relationship between a media organization and its audience, notably for a national broadcasting corporation such as the public broadcaster.
"This failing had the possibility to damage the exceptionally strong amounts of trust that the public would have put in a documentary produced by the BBC about the Israel-Gaza war."
The programme was withdrawn from iPlayer in February after the boy's familial connections were revealed, and in the month of July an internal BBC review found it violated the organization's journalistic standards on accuracy.
A BBC spokesperson commented: "The authority's determination is in accordance with the conclusions of the corporation's inquiry, that there was a major oversight in the documentary in relation to the BBC's Editorial Guidelines on factual correctness, which reflects Rule 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we accept the regulator's ruling in its entirety. We will adhere to the directive as soon as the schedule and language are determined."
