The British broadcaster was found to have committed a "major breach" of media regulations by not revealing that the narrator of a film about Gaza was the child of a Hamas representative, according to UK media regulator Ofcom.
An investigation by Ofcom into Gaza: How to Survive a Warzone has determined that the documentary was "significantly deceptive".
The BBC's director general had already issued an apology, saying there had been "a major oversight in relation to accuracy".
The regulator has ordered the corporation to transmit a prime-time announcement about its decisions.
"Since this amounts to a major infringement of our rules, we are instructing the BBC to transmit a statement of our findings against it on the BBC's second channel at 9pm, with a schedule to be confirmed," the statement read.
'Risk to Erode Confidence'
The watchdog's announcement declared: "Our probe found that the documentary's failure to disclose that the narrator's male guardian occupied a position in the Hamas-controlled administration was materially misleading.
"Consequently that the audience did not have critical information which may have been highly relevant to their assessment of the presenter and the details he shared.
"Confidence is at the core of the connection between a television network and its audience, especially for a national broadcasting corporation such as the British Broadcasting Corporation.
"This oversight had the risk to damage the exceptionally strong degrees of confidence that viewers would have put in a documentary produced by the BBC about the conflict in Gaza."
The documentary was withdrawn from iPlayer in last February after the boy's personal associations emerged, and in this past July an corporation's own inquiry found it breached the broadcaster's content policies on truthfulness.
A corporation official stated: "The Ofcom ruling is in line with the conclusions of the corporation's inquiry, that there was a serious error 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 expressed regret for this and we accept the regulator's ruling in complete. We will comply with the directive as soon as the date and language are confirmed."
