The BBC engaged in a "major breach" of media regulations by not revealing that the voice of a documentary about Gaza was the child of a Hamas representative, according to UK media regulator Ofcom.
An probe by Ofcom into the documentary titled Gaza: How to Survive a Warzone has determined that the documentary was "significantly deceptive".
The head of the BBC had previously apologised, saying there had been "a serious error in relation to accuracy".
The authority has ordered the broadcaster to transmit a prime-time declaration about its decisions.
"Since this amounts to a significant violation of our rules, we are directing the corporation to broadcast a announcement of our findings against it on BBC2 at 9pm, with a schedule to be determined," it said.
'Possibility to Undermine Trust'
The authority's announcement declared: "The inquiry we conducted concluded that the programme's omission to reveal that the voice's male guardian served in a role in the Hamas-administered authority was substantially inaccurate.
"Consequently that the audience did not have vital facts which may have been very significant to their evaluation of the presenter and the details he shared.
"Confidence is at the core of the bond between a broadcaster and its viewers, notably for a national broadcasting corporation such as the British Broadcasting Corporation.
"This error had the potential to erode the significantly high amounts of confidence that the public would have placed in a documentary produced by the BBC about the Israel-Gaza war."
The documentary was pulled from the BBC's streaming service in February after the boy's personal associations were revealed, and in July an internal BBC review found it breached the organization's journalistic standards on factual correctness.
A representative for the broadcaster said: "The Ofcom ruling is in agreement with the conclusions of Peter Johnston's review, that there was a major oversight in the programme in relation to the broadcaster's journalistic policies on factual correctness, which aligns with regulation 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we agree with Ofcom's decision in complete. We will comply with the penalty as soon as the timing and language are confirmed."
