The public service broadcaster engaged in a "major breach" of media regulations by failing to disclose that the narrator of a programme about Gaza was the son of a Hamas administrator, as determined by British broadcasting authority Ofcom.
An investigation by Ofcom into Gaza: How to Survive a Warzone has determined that the programme was "substantially inaccurate".
The BBC's director general had earlier expressed regret, saying there had been "a serious error in relation to truthfulness".
Ofcom has instructed the corporation to air a prime-time statement about its decisions.
"Given this constitutes a major infringement of our code, we are instructing the BBC to air a statement of our determinations against it on BBC2 at nine o'clock in the evening, with a timing to be determined," the statement read.
'Risk to Undermine Trust'
The watchdog's announcement declared: "Our probe concluded that the documentary's failure to disclose that the voice's male guardian held a position in the Hamas-run authority was substantially inaccurate.
"Consequently that the audience did not have essential details which may have been very significant to their assessment of the voice and the content he shared.
"Credibility is at the core of the connection between a media organization and its audience, notably for a state-funded media outlet such as the British Broadcasting Corporation.
"This oversight had the potential to erode the significantly high amounts of trust that viewers would have put in a BBC factual programme about the conflict in Gaza."
The programme was removed from the online platform in last February after the boy's family links came to light, and in the month of July an internal BBC review concluded it violated the corporation's journalistic standards on accuracy.
A representative for the broadcaster commented: "The regulator's decision is in agreement with the conclusions of the corporation's inquiry, that there was a major oversight in the programme in relation to the corporation's content standards on accuracy, which reflects clause 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we accept the authority's determination in its entirety. We will comply with the directive as soon as the date and language are finalised."
