The BBC was found to have committed a "significant breach" of media regulations by not revealing that the presenter of a programme about the Gaza conflict was the child of a Hamas official, as determined by regulatory body Ofcom.
An inquiry by the broadcasting watchdog into Gaza: How to Survive a Warzone has determined that the programme was "substantially inaccurate".
The chief executive of the broadcaster had earlier expressed regret, saying there had been "a serious error in relation to factual correctness".
The authority has directed the BBC to transmit a peak-time statement about its conclusions.
"Since this amounts to a serious breach of our regulations, we are instructing the corporation to transmit a announcement of our findings against it on the BBC's second channel at nine o'clock in the evening, with a date to be determined," the statement read.
'Potential to Undermine Trust'
The authority's announcement stated: "Our investigation concluded that the documentary's lack of disclosure that the presenter's father occupied a role in the Hamas-run administration was significantly deceptive.
"Consequently that the audience did not have critical information which may have been highly relevant to their judgment of the voice and the content he presented.
"Credibility is at the heart of the relationship between a broadcaster and its viewers, notably for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the risk to damage the exceptionally strong levels of confidence that the public would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The documentary was removed from the online platform in last February after the boy's personal associations came to light, and in this past July an internal BBC review found it infringed the corporation's editorial guidelines on truthfulness.
A corporation official commented: "The Ofcom ruling is in line with the conclusions of the corporation's inquiry, that there was a serious error in the programme in relation to the corporation's content standards on accuracy, which aligns with Rule 2.2 of the regulator's media standards.
"We issued an apology for this and we comply with the regulator's ruling in full. We will follow the penalty as soon as the date and language are finalised."
