The British broadcaster engaged in a "significant breach" of media regulations by omitting to mention that the narrator of a programme about the Gaza situation was the child of a Hamas representative, according to UK media regulator Ofcom.
An investigation by the media regulator into the programme Gaza: How to Survive a Warzone has concluded that the programme was "substantially inaccurate".
The head of the BBC had previously apologised, saying there had been "a serious error in relation to accuracy".
The authority has ordered the BBC to transmit a evening statement about its conclusions.
"As this represents a significant violation of our code, we are instructing the corporation to transmit a message of our determinations against it on BBC2 at 9pm, with a schedule to be determined," the regulator stated.
'Potential to Damage Credibility'
The authority's statement stated: "The inquiry we conducted found that the film's omission to reveal that the presenter's parent served in a position in the Hamas-run administration was materially misleading.
"This implied that the audience did not have critical information which may have been extremely pertinent to their assessment of the voice and the content he presented.
"Credibility is at the center of the connection between a television network and its viewers, especially for a public service broadcaster such as the BBC.
"This error had the risk to undermine the significantly high levels of confidence that the public would have put in a factual film from the broadcaster about the Israel-Gaza war."
The programme was withdrawn from iPlayer in last February after the boy's personal associations emerged, and in the month of July an corporation's own inquiry determined it violated the organization's journalistic standards on accuracy.
A BBC spokesperson said: "The Ofcom ruling is in agreement with the findings of the internal assessment, that there was a serious error in the documentary in relation to the corporation's content standards on factual correctness, 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 adhere to the sanction as soon as the date and wording are determined."
