The public service broadcaster was found to have committed a "serious breach" of broadcasting rules by not revealing that the voice of a film about the Gaza conflict was the child of a Hamas representative, as ruled by British broadcasting authority Ofcom.
An probe by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the programme was "substantially inaccurate".
The BBC's director general had previously apologised, saying there had been "a serious error in relation to factual correctness".
Ofcom has directed the BBC to broadcast a prime-time statement about its conclusions.
"Given this constitutes a serious breach of our regulations, we are instructing the broadcaster to broadcast a statement of our conclusions against it on the BBC's second channel at 21:00, with a date to be determined," the regulator stated.
'Possibility to Undermine Credibility'
The authority's statement stated: "The inquiry we conducted concluded that the film's failure to disclose that the voice's father served in a role in the Hamas-run administration was substantially inaccurate.
"This implied that the viewers did not have critical information which may have been highly relevant to their judgment of the narrator and the content he presented.
"Confidence is at the core of the relationship between a broadcaster and its audience, especially for a public service broadcaster such as the public broadcaster.
"This error had the risk to damage the very considerable levels of credibility that viewers would have invested in a BBC factual programme about the Israel-Gaza war."
The programme was withdrawn from the BBC's streaming service in last February after the narrator's personal associations came to light, and in the month of July an corporation's own inquiry concluded it breached the corporation's journalistic standards on accuracy.
A corporation official stated: "The authority's determination is in agreement with the findings of the corporation's inquiry, that there was a serious error in the documentary in relation to the corporation's content standards on accuracy, which reflects Rule 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we agree with the authority's determination in complete. We will adhere to the directive as soon as the date and language are determined."
