The BBC was found to have committed a "major breach" of broadcasting rules by not revealing that the voice of a film about the Gaza situation was the child of a Hamas official, according to regulatory body Ofcom.
An probe by Ofcom into Gaza: How to Survive a Warzone has determined that the film was "significantly deceptive".
The chief executive of the broadcaster had already issued an apology, saying there had been "a significant failing in relation to factual correctness".
The regulator has directed the broadcaster to transmit a peak-time announcement about its conclusions.
"As this represents a serious breach of our rules, we are ordering the corporation to transmit a statement of our findings against it on BBC2 at 21:00, with a date to be finalised," the statement read.
'Risk to Undermine Credibility'
The authority's statement stated: "Our probe concluded that the documentary's failure to disclose that the voice's father served in a position in the Hamas-controlled administration was substantially inaccurate.
"This implied that the audience did not have vital facts which may have been extremely pertinent to their judgment of the presenter and the information he shared.
"Confidence is at the center of the bond between a television network and its audience, especially for a national broadcasting corporation such as the British Broadcasting Corporation.
"This error had the risk to undermine the significantly high amounts of trust that viewers would have invested in a documentary produced by the BBC about the conflict in Gaza."
The programme was pulled from the BBC's streaming service in the month of February after the boy's familial connections were revealed, and in this past July an broadcaster's internal assessment found it breached the broadcaster's content policies on factual correctness.
A representative for the broadcaster said: "The regulator's decision is in agreement with the results of the internal assessment, that there was a major oversight in the film in relation to the corporation's content standards on factual correctness, which aligns with Rule 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we accept the authority's determination in its entirety. We will follow the sanction as soon as the date and wording are finalised."
