The British broadcaster was found to have committed a "significant breach" of broadcasting rules by not revealing that the voice of a film about the Gaza situation was the offspring of a Hamas administrator, as determined by British broadcasting authority Ofcom.
An probe by Ofcom into the programme Gaza: How to Survive a Warzone has determined that the documentary was "materially misleading".
The BBC's director general had already issued an apology, noting there had been "a serious error in relation to truthfulness".
The authority has ordered the BBC to transmit a peak-time statement about its decisions.
"Given this constitutes a significant violation of our code, we are directing the BBC to broadcast a announcement of our findings against it on BBC Two at nine o'clock in the evening, with a schedule to be determined," it said.
'Risk to Undermine Credibility'
The watchdog's announcement declared: "Our investigation determined that the programme's omission to reveal that the presenter's father held a role in the Hamas-run authority was materially misleading.
"This implied that the viewers did not have essential details which may have been very significant to their judgment of the voice and the information he presented.
"Credibility is at the core of the bond between a media organization and its viewers, particularly for a national broadcasting corporation such as the BBC.
"This error had the risk to erode the exceptionally strong amounts of credibility that audiences would have invested in a BBC factual programme about the conflict in Gaza."
The programme was pulled from the BBC's streaming service in February after the boy's family links were revealed, and in this past July an broadcaster's internal assessment determined it violated the broadcaster's editorial guidelines on truthfulness.
A BBC spokesperson said: "The Ofcom ruling is in agreement with the conclusions of the internal assessment, that there was a significant failing in the programme in relation to the BBC's Editorial Guidelines on accuracy, which corresponds to clause 2.2 of the regulator's media standards.
"We have apologised for this and we comply with Ofcom's decision in full. We will comply with the sanction as soon as the timing and wording are confirmed."
