The public service broadcaster was found to have committed a "significant breach" of broadcasting rules by not revealing that the voice of a film about Gaza was the son of a Hamas representative, as determined by British broadcasting authority Ofcom.
An probe by the broadcasting watchdog into Gaza: How to Survive a Warzone has found that the film was "substantially inaccurate".
The chief executive of the broadcaster had earlier expressed regret, stating there had been "a significant failing in relation to truthfulness".
The authority has directed the broadcaster to air a evening declaration about its conclusions.
"Given this constitutes a significant violation of our regulations, we are instructing the broadcaster to air a announcement of our determinations against it on BBC Two at 21:00, with a timing to be finalised," it said.
'Possibility to Damage Credibility'
The authority's statement declared: "Our investigation found that the film's omission to reveal that the voice's father occupied a position in the Hamas-controlled authority was substantially inaccurate.
"It meant that the audience did not have critical information which may have been highly relevant to their judgment of the narrator and the content he provided.
"Confidence is at the heart of the connection between a television network and its public, notably for a national broadcasting corporation such as the public broadcaster.
"This error had the risk to damage the significantly high levels of trust that viewers would have placed in a BBC factual programme about the Gaza conflict."
The documentary was pulled from the BBC's streaming service in the month of February after the narrator's familial connections came to light, and in the month of July an broadcaster's internal assessment concluded it breached the organization's editorial guidelines on factual correctness.
A corporation official said: "The Ofcom ruling is in accordance with the findings of the internal assessment, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on factual correctness, which aligns with clause 2.2 of the regulator's media standards.
"We have apologised for this and we comply with the authority's determination in its entirety. We will comply with the directive as soon as the date and wording are finalised."
