The British broadcaster was found to have committed a "significant breach" of industry standards by omitting to mention that the presenter of a documentary about the Gaza conflict was the son of a Hamas administrator, as determined by UK media regulator Ofcom.
An investigation by the media regulator into Gaza: How to Survive a Warzone has concluded that the film was "materially misleading".
The head of the BBC had earlier expressed regret, stating there had been "a serious error in relation to accuracy".
The regulator has directed the broadcaster to air a prime-time announcement about its conclusions.
"Given this constitutes a significant violation of our regulations, we are directing the corporation to air a message of our conclusions against it on BBC2 at nine o'clock in the evening, with a timing to be confirmed," the statement read.
'Risk to Erode Confidence'
The watchdog's announcement said: "Our probe concluded that the programme's omission to reveal that the voice's male guardian held a post in the Hamas-controlled government was materially misleading.
"It meant that the audience did not have vital facts which may have been highly relevant to their assessment of the presenter and the information he provided.
"Credibility is at the center of the relationship between a media organization and its audience, notably for a state-funded media outlet such as the British Broadcasting Corporation.
"This error had the possibility to damage the very considerable levels of trust that audiences would have invested in a factual film from the broadcaster about the Gaza conflict."
The documentary was pulled from the BBC's streaming service in last February after the boy's personal associations were revealed, and in this past July an internal BBC review determined it breached the corporation's content policies on accuracy.
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 broadcaster's journalistic policies on accuracy, which aligns with Rule 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we agree with the regulator's ruling in its entirety. We will adhere to the sanction as soon as the date and language are determined."
