The British broadcaster was found to have committed a "serious breach" of media regulations by omitting to mention that the narrator of a programme about the Gaza situation was the offspring of a Hamas representative, as ruled by regulatory body Ofcom.
An probe by the media regulator into the documentary titled Gaza: How to Survive a Warzone has determined that the documentary was "substantially inaccurate".
The BBC's director general had previously apologised, saying there had been "a significant failing in relation to factual correctness".
The authority has directed the broadcaster to transmit a peak-time announcement about its conclusions.
"Given this constitutes a serious breach of our regulations, we are instructing the corporation to transmit a announcement of our conclusions against it on the BBC's second channel at 9pm, with a date to be finalised," the regulator stated.
'Possibility to Damage Confidence'
The authority's report declared: "Our probe found that the film's omission to reveal that the voice's parent served in a post in the Hamas-administered authority was substantially inaccurate.
"This implied that the viewers did not have critical information which may have been highly relevant to their judgment of the presenter and the content he shared.
"Confidence is at the center of the connection between a television network and its viewers, especially for a public service broadcaster such as the British Broadcasting Corporation.
"This error had the risk to erode the very considerable levels of credibility that the public would have placed in a factual film from the broadcaster about the Gaza conflict."
The film was removed from iPlayer in February after the presenter's personal associations emerged, and in the month of July an broadcaster's internal assessment found it breached the corporation's journalistic standards on truthfulness.
A corporation official commented: "The Ofcom ruling is in agreement with the results of Peter Johnston's review, that there was a serious error in the programme in relation to the broadcaster's journalistic policies on factual correctness, which corresponds to clause 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we agree with the authority's determination in full. We will follow the directive as soon as the schedule and language are finalised."
