The British broadcaster committed a "major breach" of media regulations by not revealing that the presenter of a documentary about Gaza was the son of a Hamas representative, according to UK media regulator Ofcom.
An inquiry by Ofcom into Gaza: How to Survive a Warzone has determined that the film was "substantially inaccurate".
The BBC's director general had previously apologised, stating there had been "a serious error in relation to factual correctness".
The regulator has ordered the broadcaster to transmit a prime-time declaration about its decisions.
"Given this constitutes a major infringement of our regulations, we are instructing the BBC to transmit a announcement of our conclusions against it on the BBC's second channel at 9pm, with a schedule to be confirmed," the statement read.
'Risk to Erode Confidence'
The regulator's statement said: "Our probe determined that the film's lack of disclosure that the presenter's male guardian held a role in the Hamas-controlled authority was substantially inaccurate.
"This implied that the audience did not have critical information which may have been extremely pertinent to their evaluation of the voice and the content he shared.
"Trust is at the heart of the bond between a broadcaster and its viewers, notably for a public service broadcaster such as the British Broadcasting Corporation.
"This failing had the potential to damage the significantly high amounts of confidence that viewers would have placed in a BBC factual programme about the Gaza conflict."
The programme was withdrawn from the BBC's streaming service in the month of February after the boy's personal associations emerged, and in July an broadcaster's internal assessment found it infringed the broadcaster's content policies on factual correctness.
A representative for the broadcaster said: "The Ofcom ruling is in agreement with the findings of the corporation's inquiry, that there was a serious error in the film in relation to the broadcaster's journalistic policies on factual correctness, which aligns with clause 2.2 of the regulator's media standards.
"We issued an apology for this and we accept the regulator's ruling in its entirety. We will follow the sanction as soon as the date and wording are finalised."
