The BBC committed a "major breach" of industry standards by not revealing that the presenter of a documentary about the Gaza conflict was the son of a Hamas representative, as determined by UK media regulator Ofcom.
An inquiry by Ofcom into the documentary titled Gaza: How to Survive a Warzone has concluded that the programme was "materially misleading".
The head of the BBC had already issued an apology, noting there had been "a serious error in relation to accuracy".
The authority has instructed the BBC to air a peak-time declaration about its decisions.
"Given this constitutes a significant violation of our rules, we are instructing the BBC to transmit a statement of our conclusions against it on BBC2 at 21:00, with a timing to be determined," it said.
'Potential to Damage Credibility'
The regulator's report said: "The inquiry we conducted concluded that the film's lack of disclosure that the narrator's father served in a role in the Hamas-administered authority was substantially inaccurate.
"It meant that the audience did not have vital facts which may have been extremely pertinent to their judgment of the voice and the content he provided.
"Credibility is at the heart of the bond between a television network and its public, particularly for a public service broadcaster such as the British Broadcasting Corporation.
"This oversight had the potential to undermine the exceptionally strong degrees of credibility that the public would have put in a documentary produced by the BBC about the conflict in Gaza."
The film was pulled from the online platform in February after the boy's familial connections emerged, and in this past July an internal BBC review concluded it breached the broadcaster's content policies on truthfulness.
A corporation official commented: "The authority's determination is in agreement with the conclusions of the corporation's inquiry, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on truthfulness, which aligns with regulation 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we accept the regulator's ruling in complete. We will adhere to the sanction as soon as the timing and language are finalised."
