The BBC committed a "significant breach" of industry standards by omitting to mention that the narrator of a documentary about the Gaza conflict was the offspring of a Hamas representative, according to regulatory body 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 previously apologised, saying there had been "a major oversight in relation to factual correctness".
Ofcom has ordered the BBC to transmit a prime-time statement about its decisions.
"Given this constitutes a significant violation of our code, we are ordering the corporation to transmit a statement of our conclusions against it on the BBC's second channel at 9pm, with a schedule to be finalised," it said.
'Potential to Undermine Confidence'
The watchdog's report said: "The inquiry we conducted concluded that the film's lack of disclosure that the voice's male guardian occupied a position in the Hamas-administered administration was materially misleading.
"This implied that the public did not have critical information which may have been highly relevant to their assessment of the narrator and the information he provided.
"Confidence is at the heart of the bond between a television network and its public, notably for a national broadcasting corporation such as the British Broadcasting Corporation.
"This oversight had the possibility to damage the significantly high levels of trust that the public would have placed in a BBC factual programme about the conflict in Gaza."
The programme was pulled from the BBC's streaming service in the month of February after the boy's personal associations came to light, and in this past July an corporation's own inquiry concluded it violated the broadcaster's editorial guidelines on truthfulness.
A BBC spokesperson commented: "The regulator's decision is in accordance with the conclusions of the internal assessment, that there was a significant failing in the programme in relation to the corporation's content standards on accuracy, which aligns with regulation 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we comply with Ofcom's decision in its entirety. We will comply with the penalty as soon as the schedule and wording are confirmed."
