The British broadcaster was found to have committed a "serious breach" of industry standards by not revealing that the voice of a programme about Gaza was the child of a Hamas representative, as ruled by British broadcasting authority Ofcom.
An investigation by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has concluded that the documentary was "significantly deceptive".
The BBC's director general had already issued an apology, stating there had been "a major oversight in relation to accuracy".
The regulator has instructed the BBC to air a prime-time statement about its findings.
"Given this constitutes a significant violation of our code, we are directing the broadcaster to transmit a message of our findings against it on BBC Two at 9pm, with a timing to be finalised," it said.
'Possibility to Undermine Confidence'
The regulator's report declared: "Our investigation determined that the documentary's failure to disclose that the narrator's parent served in a post in the Hamas-run authority was substantially inaccurate.
"It meant that the public did not have vital facts which may have been highly relevant to their judgment of the narrator and the details he provided.
"Credibility is at the core of the relationship between a media organization and its audience, especially for a public service broadcaster such as the BBC.
"This error had the potential to undermine the very considerable degrees of credibility that viewers would have invested in a BBC factual programme about the conflict in Gaza."
The programme was withdrawn from the online platform in the month of February after the boy's personal associations were revealed, and in July an internal BBC review determined it violated the corporation's editorial guidelines on accuracy.
A corporation official said: "The Ofcom ruling is in accordance with the conclusions of Peter Johnston's review, that there was a serious error in the film in relation to the broadcaster's journalistic policies on accuracy, which aligns with regulation 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we comply with the authority's determination in complete. We will adhere to the sanction as soon as the timing and language are finalised."
