The BBC committed a "major breach" of media regulations by omitting to mention that the voice of a documentary about the Gaza situation was the child of a Hamas representative, as determined by British broadcasting authority Ofcom.
An investigation by Ofcom into the programme Gaza: How to Survive a Warzone has determined that the programme was "significantly deceptive".
The BBC's director general had earlier expressed regret, saying there had been "a significant failing in relation to accuracy".
Ofcom has ordered the BBC to broadcast a peak-time declaration about its findings.
"As this represents a significant violation of our regulations, we are directing the corporation to air a statement of our findings against it on BBC Two at 9pm, with a schedule to be determined," the regulator stated.
'Risk to Erode Trust'
The authority's statement said: "Our probe found that the film's omission to reveal that the voice's parent held a position in the Hamas-run administration was materially misleading.
"This implied that the viewers did not have critical information which may have been highly relevant to their evaluation of the narrator and the information he shared.
"Credibility is at the core of the connection between a media organization and its audience, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This error had the risk to damage 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The programme was withdrawn from iPlayer in the month of February after the boy's personal associations came to light, and in July an broadcaster's internal assessment determined it breached the organization's journalistic standards on truthfulness.
A representative for the broadcaster commented: "The Ofcom ruling is in accordance with the conclusions of the corporation's inquiry, that there was a serious error in the film in relation to the BBC's Editorial Guidelines on factual correctness, which reflects Rule 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we comply with Ofcom's decision in its entirety. We will adhere to the directive as soon as the timing and wording are determined."
