The BBC was found to have committed a "major breach" of media regulations by failing to disclose that the voice of a film about Gaza was the child of a Hamas official, as determined by UK media regulator Ofcom.
An investigation by the broadcasting watchdog into Gaza: How to Survive a Warzone has found that the documentary was "significantly deceptive".
The BBC's director general had previously apologised, stating there had been "a serious error in relation to factual correctness".
Ofcom has ordered the BBC to air a evening announcement about its decisions.
"As this represents a significant violation of our code, we are directing the BBC to transmit a message of our findings against it on BBC2 at nine o'clock in the evening, with a date to be finalised," the regulator stated.
'Risk to Erode Confidence'
The authority's statement said: "Our investigation determined that the documentary's omission to reveal that the narrator's parent held a post in the Hamas-run government was substantially inaccurate.
"It meant that the viewers did not have critical information which may have been extremely pertinent to their judgment of the voice and the content he shared.
"Trust is at the heart of the relationship between a media organization and its viewers, notably for a national broadcasting corporation such as the British Broadcasting Corporation.
"This oversight had the possibility to erode the very considerable degrees of confidence that audiences would have put in a factual film from the broadcaster about the Gaza conflict."
The documentary was withdrawn from the online platform in last February after the boy's personal associations came to light, and in July an corporation's own inquiry concluded it violated the organization's editorial guidelines on accuracy.
A representative for the broadcaster commented: "The Ofcom ruling is in agreement with the results of the corporation's inquiry, that there was a significant failing in the film in relation to the corporation's content standards on accuracy, which aligns with Rule 2.2 of the regulator's media standards.
"We expressed regret for this and we comply with the authority's determination in full. We will adhere to the penalty as soon as the date and language are finalised."
