The public service broadcaster engaged in a "major breach" of industry standards by omitting to mention that the narrator of a documentary about the Gaza situation was the child of a Hamas administrator, as determined by British broadcasting authority Ofcom.
An investigation by Ofcom into the programme Gaza: How to Survive a Warzone has concluded that the film was "materially misleading".
The BBC's director general had already issued an apology, noting there had been "a major oversight in relation to accuracy".
The authority has ordered the BBC to broadcast a evening announcement about its decisions.
"As this represents a serious breach of our regulations, we are instructing the broadcaster to broadcast a announcement of our determinations against it on BBC2 at nine o'clock in the evening, with a date to be finalised," the regulator stated.
'Potential to Undermine Credibility'
The watchdog's statement stated: "Our investigation determined that the documentary's lack of disclosure that the presenter's male guardian occupied a post in the Hamas-run government was significantly deceptive.
"This implied that the public did not have vital facts which may have been extremely pertinent to their assessment of the voice and the information he presented.
"Credibility is at the center of the bond between a media organization and its viewers, notably for a state-funded media outlet such as the BBC.
"This failing had the potential to damage the exceptionally strong levels of credibility that audiences would have put in a documentary produced by the BBC about the Israel-Gaza war."
The programme was pulled from the online platform in last February after the boy's personal associations emerged, and in this past July an broadcaster's internal assessment concluded it breached the corporation's journalistic standards on accuracy.
A corporation official stated: "The regulator's decision is in agreement with the conclusions of Peter Johnston's review, that there was a major oversight in the film in relation to the corporation's content standards on truthfulness, which corresponds to Rule 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept Ofcom's decision in its entirety. We will follow the directive as soon as the timing and wording are confirmed."
