The British broadcaster engaged in a "major breach" of broadcasting rules by omitting to mention that the voice of a documentary about the Gaza conflict was the son of a Hamas official, according to regulatory body Ofcom.
An investigation by the broadcasting watchdog into Gaza: How to Survive a Warzone has determined that the film was "substantially inaccurate".
The chief executive of the broadcaster had previously apologised, saying there had been "a major oversight in relation to accuracy".
Ofcom has instructed the corporation to transmit a prime-time announcement about its conclusions.
"Since this amounts to a major infringement of our regulations, we are directing the corporation to broadcast a statement of our conclusions against it on the BBC's second channel at nine o'clock in the evening, with a schedule to be confirmed," it said.
'Possibility to Damage Trust'
The watchdog's statement said: "Our probe concluded that the documentary's lack of disclosure that the narrator's father held a role in the Hamas-controlled authority was significantly deceptive.
"Consequently that the public did not have vital facts which may have been very significant to their judgment of the narrator and the information he provided.
"Confidence is at the center of the bond between a television network and its audience, particularly for a public service broadcaster such as the BBC.
"This error had the risk to damage the significantly high degrees of credibility that audiences would have put in a factual film from the broadcaster about the conflict in Gaza."
The documentary was pulled from iPlayer in the month of February after the boy's family links were revealed, and in July an internal BBC review concluded it breached the broadcaster's journalistic standards on factual correctness.
A corporation official stated: "The Ofcom ruling is in agreement with the results 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 corresponds to Rule 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we comply with Ofcom's decision in complete. We will comply with the sanction as soon as the schedule and language are confirmed."
