The British broadcaster was found to have committed a "serious breach" of industry standards by not revealing that the narrator 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 broadcasting watchdog into the programme Gaza: How to Survive a Warzone has determined that the documentary was "materially misleading".
The BBC's director general had earlier expressed regret, saying there had been "a serious error in relation to factual correctness".
The regulator has directed the broadcaster to transmit a peak-time declaration about its findings.
"Given this constitutes a significant violation of our code, we are directing the broadcaster to transmit a announcement of our findings against it on BBC2 at 9pm, with a date to be determined," it said.
'Potential to Undermine Credibility'
The authority's report declared: "Our probe concluded that the documentary's lack of disclosure that the presenter's male guardian held a post in the Hamas-run authority was substantially inaccurate.
"It meant that the public did not have essential details which may have been extremely pertinent to their assessment of the voice and the details he shared.
"Confidence is at the heart of the bond between a media organization and its audience, particularly for a national broadcasting corporation such as the BBC.
"This oversight had the risk to erode the exceptionally strong degrees of confidence that the public would have placed in a documentary produced by the BBC about the Gaza conflict."
The programme was removed from the online platform in February after the boy's family links were revealed, and in the month of July an internal BBC review concluded it violated the corporation's content policies on factual correctness.
A representative for the broadcaster stated: "The regulator's decision is in agreement with the findings of the corporation's inquiry, that there was a significant failing in the documentary in relation to the BBC's Editorial Guidelines on factual correctness, which reflects Rule 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we agree with the authority's determination in full. We will follow the penalty as soon as the date and language are confirmed."
