The British broadcaster was found to have committed a "significant breach" of broadcasting rules by not revealing that the voice of a programme about Gaza was the child of a Hamas representative, as determined by British broadcasting authority Ofcom.
An inquiry by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has found that the film was "substantially inaccurate".
The chief executive of the broadcaster had earlier expressed regret, noting there had been "a serious error in relation to truthfulness".
Ofcom has directed the corporation to transmit a peak-time statement about its conclusions.
"Given this constitutes a major infringement of our code, we are directing the BBC to transmit a message of our determinations against it on BBC Two at nine o'clock in the evening, with a schedule to be finalised," it said.
'Possibility to Undermine Credibility'
The regulator's announcement declared: "The inquiry we conducted determined that the film's omission to reveal that the voice's male guardian held a role in the Hamas-administered government was materially misleading.
"Consequently that the audience did not have essential details which may have been very significant to their judgment of the narrator and the information he presented.
"Trust is at the heart of the connection between a broadcaster and its viewers, particularly for a public service broadcaster such as the BBC.
"This error had the possibility to damage the very considerable levels of credibility that viewers would have placed in a BBC factual programme about the Gaza conflict."
The programme was pulled from the online platform in the month of February after the narrator's family links were revealed, and in the month of July an corporation's own inquiry determined it violated the corporation's editorial guidelines on truthfulness.
A BBC spokesperson commented: "The Ofcom ruling is in agreement with the conclusions of Peter Johnston's review, that there was a serious error in the film in relation to the BBC's Editorial Guidelines on factual correctness, which reflects Rule 2.2 of the regulator's media standards.
"We expressed regret for this and we comply with the regulator's ruling in full. We will adhere to the sanction as soon as the timing and wording are finalised."
