The BBC committed a "significant breach" of broadcasting rules by omitting to mention that the narrator of a programme about the Gaza conflict was the son of a Hamas representative, as determined by British broadcasting authority Ofcom.
An probe by the broadcasting watchdog into Gaza: How to Survive a Warzone has found that the film was "substantially inaccurate".
The chief executive of the broadcaster had already issued an apology, stating there had been "a significant failing in relation to factual correctness".
The authority has instructed the broadcaster to broadcast a peak-time statement about its findings.
"Given this constitutes a significant violation of our regulations, we are ordering the BBC to broadcast a announcement of our determinations against it on BBC2 at nine o'clock in the evening, with a date to be finalised," it said.
'Possibility to Erode Trust'
The regulator's report said: "Our probe concluded that the documentary's lack of disclosure that the narrator's parent held a post in the Hamas-controlled administration was substantially inaccurate.
"It meant that the public did not have essential details which may have been extremely pertinent to their evaluation of the presenter and the details he provided.
"Confidence is at the heart of the connection between a television network and its audience, notably for a national broadcasting corporation such as the BBC.
"This oversight had the possibility to erode the significantly high degrees of confidence that viewers would have put in a documentary produced by the BBC about the Israel-Gaza war."
The programme was removed from iPlayer in last February after the boy's personal associations came to light, and in the month of July an internal BBC review concluded it violated the corporation's editorial guidelines on accuracy.
A corporation official stated: "The Ofcom ruling is in line with the conclusions of Peter Johnston's review, that there was a major oversight in the film in relation to the BBC's Editorial Guidelines on truthfulness, which aligns with clause 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we comply with Ofcom's decision in full. We will follow the penalty as soon as the date and wording are finalised."
