The British broadcaster engaged in a "major breach" of media regulations by failing to disclose that the voice of a programme about Gaza was the son of a Hamas representative, as ruled by British broadcasting authority Ofcom.
An investigation by the media regulator into the programme Gaza: How to Survive a Warzone has determined that the documentary was "substantially inaccurate".
The head of the BBC had previously apologised, noting there had been "a major oversight in relation to accuracy".
The authority has instructed the broadcaster to air a evening declaration about its findings.
"Since this amounts to a significant violation of our code, we are instructing the corporation to air a announcement of our conclusions against it on the BBC's second channel at nine o'clock in the evening, with a date to be determined," it said.
'Risk to Damage Confidence'
The authority's announcement said: "Our investigation determined that the programme's omission to reveal that the voice's male guardian served in a post in the Hamas-run administration was significantly deceptive.
"Consequently that the viewers did not have critical information which may have been highly relevant to their judgment of the narrator and the information he provided.
"Confidence is at the core of the bond between a television network and its public, especially for a national broadcasting corporation such as the public broadcaster.
"This error had the potential to erode the exceptionally strong degrees of confidence that viewers would have placed in a factual film from the broadcaster about the Israel-Gaza war."
The film was withdrawn from the BBC's streaming service in February after the presenter's familial connections were revealed, and in the month of July an corporation's own inquiry found it infringed the organization's journalistic standards on factual correctness.
A BBC spokesperson commented: "The authority's determination is in line with the conclusions of Peter Johnston's review, that there was a significant failing in the programme in relation to the corporation's content standards on truthfulness, which corresponds to Rule 2.2 of the regulator's media standards.
"We expressed regret for this and we accept Ofcom's decision in complete. We will comply with the directive as soon as the timing and wording are confirmed."
