The public service broadcaster committed a "serious breach" of broadcasting rules by failing to disclose that the narrator of a film about Gaza was the offspring of a Hamas official, as determined by British broadcasting authority Ofcom.
An probe by Ofcom into the programme Gaza: How to Survive a Warzone has concluded that the documentary was "substantially inaccurate".
The chief executive of the broadcaster had already issued an apology, saying there had been "a serious error in relation to truthfulness".
Ofcom has instructed the broadcaster to broadcast a prime-time statement about its decisions.
"As this represents a major infringement of our regulations, we are directing the corporation to air a message of our findings against it on BBC Two at 21:00, with a timing to be determined," the regulator stated.
'Potential to Damage Trust'
The authority's statement said: "Our investigation determined that the programme's failure to disclose that the voice's parent served in a post in the Hamas-run authority was substantially inaccurate.
"This implied that the audience did not have vital facts which may have been very significant to their assessment of the narrator and the information he shared.
"Confidence is at the core of the relationship between a media organization and its audience, particularly for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the possibility to damage the exceptionally strong degrees of credibility that viewers would have put in a BBC factual programme about the Gaza conflict."
The film was withdrawn from the BBC's streaming service in the month of February after the narrator's personal associations came to light, and in the month of July an internal BBC review determined it violated the broadcaster's content policies on accuracy.
A BBC spokesperson stated: "The authority's determination is in agreement with the results of the internal assessment, that there was a significant failing in the programme in relation to the BBC's Editorial Guidelines on factual correctness, which aligns with clause 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we agree with Ofcom's decision in full. We will follow the directive as soon as the timing and language are finalised."
