The public service broadcaster committed a "serious breach" of media regulations by omitting to mention that the voice of a film about the Gaza conflict was the son of a Hamas official, according to UK media regulator Ofcom.
An investigation by the media regulator into Gaza: How to Survive a Warzone has determined that the programme was "significantly deceptive".
The head of the BBC had earlier expressed regret, noting there had been "a serious error in relation to accuracy".
Ofcom has instructed the BBC to transmit a peak-time announcement about its decisions.
"As this represents a significant violation of our regulations, we are ordering the broadcaster to broadcast a statement of our conclusions against it on BBC2 at 21:00, with a date to be determined," the statement read.
'Possibility to Damage Credibility'
The regulator's statement stated: "Our probe concluded that the programme's lack of disclosure that the voice's male guardian served in a post in the Hamas-administered administration was materially misleading.
"It meant that the audience did not have vital facts which may have been highly relevant to their assessment of the voice and the details he shared.
"Credibility is at the core of the relationship between a broadcaster and its public, especially for a national broadcasting corporation such as the BBC.
"This oversight had the risk to erode the significantly high amounts of credibility that viewers would have placed in a documentary produced by the BBC about the Gaza conflict."
The documentary was pulled from iPlayer in the month of February after the boy's familial connections emerged, and in this past July an broadcaster's internal assessment found it infringed the broadcaster's content policies on accuracy.
A corporation official said: "The authority's determination is in line with the findings of the corporation's inquiry, that there was a major oversight in the programme in relation to the broadcaster's journalistic policies on accuracy, which reflects clause 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept Ofcom's decision in full. We will adhere to the sanction as soon as the date and wording are confirmed."
