The public service broadcaster engaged in a "major breach" of broadcasting rules by failing to disclose that the presenter of a film about the Gaza conflict was the offspring of a Hamas representative, according to British broadcasting authority Ofcom.
An probe by Ofcom into Gaza: How to Survive a Warzone has determined that the programme was "materially misleading".
The chief executive of the broadcaster had previously apologised, stating there had been "a serious error in relation to accuracy".
Ofcom has ordered the BBC to broadcast a evening declaration about its findings.
"Given this constitutes a serious breach of our code, we are directing the corporation to air a announcement of our conclusions against it on BBC2 at 21:00, with a schedule to be finalised," the regulator stated.
'Potential to Damage Credibility'
The authority's announcement declared: "Our probe concluded that the film's omission to reveal that the voice's father served in a post in the Hamas-administered authority was materially misleading.
"This implied that the audience did not have vital facts which may have been highly relevant to their assessment of the narrator and the content he provided.
"Confidence is at the center of the relationship between a broadcaster and its viewers, notably for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the risk to damage the significantly high degrees of credibility that audiences would have put in a BBC factual programme about the Israel-Gaza war."
The film was withdrawn from iPlayer in the month of February after the presenter's family links were revealed, and in the month of July an internal BBC review concluded it violated the broadcaster's content policies on accuracy.
A corporation official commented: "The regulator's decision is in agreement with the results of the corporation's inquiry, that there was a major oversight in the film in relation to the corporation's content standards on truthfulness, which aligns with regulation 2.2 of the regulator's media standards.
"We have apologised for this and we comply with the regulator's ruling in full. We will follow the directive as soon as the timing and wording are confirmed."
