The public service broadcaster engaged in a "major breach" of industry standards by not revealing that the narrator of a documentary about the Gaza conflict was the offspring of a Hamas representative, as determined by UK media regulator Ofcom.
An inquiry by Ofcom into Gaza: How to Survive a Warzone has found that the programme was "significantly deceptive".
The head of the BBC had earlier expressed regret, saying there had been "a significant failing in relation to truthfulness".
The regulator has ordered the BBC to transmit a peak-time statement about its findings.
"Given this constitutes a major infringement of our code, we are instructing the broadcaster to air a message of our conclusions against it on BBC2 at nine o'clock in the evening, with a timing to be confirmed," it said.
'Risk to Erode Confidence'
The watchdog's announcement said: "The inquiry we conducted determined that the film's omission to reveal that the presenter's father occupied a role in the Hamas-administered government was significantly deceptive.
"This implied that the audience did not have critical information which may have been extremely pertinent to their assessment of the voice and the details he presented.
"Credibility is at the core of the connection between a broadcaster and its audience, especially for a public service broadcaster such as the BBC.
"This oversight had the possibility to damage the exceptionally strong degrees of credibility that viewers would have put in a factual film from the broadcaster about the Israel-Gaza war."
The documentary was removed from the BBC's streaming service in the month of February after the boy's family links came to light, and in July an internal BBC review determined it breached the corporation's journalistic standards on factual correctness.
A BBC spokesperson said: "The Ofcom ruling is in accordance with the results of the corporation's inquiry, that there was a major oversight in the programme in relation to the broadcaster's journalistic policies on factual correctness, which reflects regulation 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we accept the regulator's ruling in complete. We will adhere to the directive as soon as the schedule and language are confirmed."
