The British broadcaster was found to have committed a "serious breach" of broadcasting rules by omitting to mention that the voice of a film about Gaza was the offspring of a Hamas representative, according to regulatory body Ofcom.
An probe by the media regulator into the documentary titled Gaza: How to Survive a Warzone has found that the programme was "substantially inaccurate".
The head of the BBC had earlier expressed regret, noting there had been "a serious error in relation to accuracy".
The authority has ordered the broadcaster to transmit a evening announcement about its decisions.
"Since this amounts to a significant violation of our regulations, we are instructing the BBC to transmit a announcement of our findings against it on the BBC's second channel at nine o'clock in the evening, with a timing to be determined," the regulator stated.
'Possibility to Damage Confidence'
The regulator's report declared: "The inquiry we conducted determined that the programme's failure to disclose that the voice's male guardian occupied a position in the Hamas-administered administration was materially misleading.
"It meant that the public did not have essential details which may have been highly relevant to their assessment of the voice and the information he provided.
"Credibility is at the core of the connection between a broadcaster and its public, especially for a national broadcasting corporation such as the British Broadcasting Corporation.
"This error had the risk to erode the significantly high degrees of confidence that audiences would have put in a BBC factual programme about the Gaza conflict."
The documentary was pulled from the BBC's streaming service in last February after the presenter's familial connections emerged, and in this past July an broadcaster's internal assessment determined it violated the broadcaster's journalistic standards on truthfulness.
A corporation official said: "The Ofcom ruling is in accordance with the conclusions of the corporation's inquiry, that there was a major oversight in the film in relation to the BBC's Editorial Guidelines on accuracy, which corresponds to Rule 2.2 of the regulator's media standards.
"We expressed regret for this and we accept the regulator's ruling in full. We will adhere to the directive as soon as the schedule and wording are confirmed."
