The British broadcaster engaged in a "serious breach" of broadcasting rules by not revealing that the presenter of a film about the Gaza situation was the child of a Hamas administrator, as ruled by regulatory body Ofcom.
An investigation by Ofcom into Gaza: How to Survive a Warzone has concluded that the film was "materially misleading".
The BBC's director general had already issued an apology, saying there had been "a serious error in relation to factual correctness".
The authority has directed the BBC to broadcast a peak-time statement about its findings.
"Since this amounts to a serious breach of our rules, we are ordering the BBC to transmit a statement of our conclusions against it on BBC2 at 9pm, with a schedule to be finalised," the regulator stated.
'Possibility to Erode Trust'
The watchdog's statement said: "Our probe found that the film's failure to disclose that the voice's parent held a position in the Hamas-administered authority was materially misleading.
"It meant that the viewers did not have vital facts which may have been very significant to their assessment of the presenter and the content he shared.
"Credibility is at the center of the bond between a television network and its viewers, notably for a national broadcasting corporation such as the British Broadcasting Corporation.
"This oversight had the risk to erode the significantly high amounts of confidence that viewers would have put in a BBC factual programme about the Gaza conflict."
The film was pulled from the online platform in February after the narrator's family links emerged, and in the month of July an internal BBC review found it infringed the organization's journalistic standards on truthfulness.
A corporation official stated: "The regulator's decision is in accordance with the findings of the internal assessment, that there was a serious error in the documentary in relation to the BBC's Editorial Guidelines on truthfulness, which corresponds to regulation 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 date and wording are finalised."
