The public service broadcaster committed a "major breach" of broadcasting rules by omitting to mention that the presenter of a film about the Gaza conflict was the offspring of a Hamas representative, as determined by British broadcasting authority Ofcom.
An probe by the media regulator into the documentary titled Gaza: How to Survive a Warzone has determined that the programme was "materially misleading".
The BBC's director general had earlier expressed regret, noting there had been "a serious error in relation to accuracy".
Ofcom has instructed the corporation to transmit a peak-time declaration about its conclusions.
"Since this amounts to a significant violation of our rules, we are directing the broadcaster to air a statement of our findings against it on the BBC's second channel at 21:00, with a schedule to be determined," it said.
'Risk to Undermine Credibility'
The authority's statement said: "The inquiry we conducted concluded that the film's omission to reveal that the narrator's parent occupied a position in the Hamas-run administration was substantially inaccurate.
"Consequently that the public did not have critical information which may have been extremely pertinent to their evaluation of the voice and the details he provided.
"Credibility is at the heart of the bond between a television network and its audience, especially for a national broadcasting corporation such as the public broadcaster.
"This failing had the possibility to erode the exceptionally strong degrees of credibility that viewers would have invested in a documentary produced by the BBC about the conflict in Gaza."
The documentary was withdrawn from the online platform in the month of February after the boy's personal associations emerged, and in this past July an broadcaster's internal assessment determined it breached the corporation's editorial guidelines on factual correctness.
A representative for the broadcaster said: "The regulator's decision is in accordance with the findings of the internal assessment, that there was a major oversight in the programme in relation to the BBC's Editorial Guidelines on accuracy, which reflects clause 2.2 of the regulator's media standards.
"We issued an apology for this and we comply with the regulator's ruling in complete. We will adhere to the sanction as soon as the schedule and wording are confirmed."
