The public service broadcaster engaged in a "serious breach" of industry standards by failing to disclose that the narrator of a programme about Gaza was the son of a Hamas official, as ruled by UK media regulator Ofcom.
An probe by Ofcom into Gaza: How to Survive a Warzone has concluded that the programme was "significantly deceptive".
The chief executive of the broadcaster had earlier expressed regret, saying there had been "a serious error in relation to factual correctness".
The regulator has ordered the BBC to air a peak-time statement about its conclusions.
"Since this amounts to a major infringement of our rules, we are ordering the BBC to broadcast a statement of our findings against it on the BBC's second channel at nine o'clock in the evening, with a timing to be finalised," it said.
'Possibility to Undermine Confidence'
The authority's statement stated: "Our probe found that the programme's lack of disclosure that the narrator's male guardian occupied a post in the Hamas-run authority was substantially inaccurate.
"Consequently that the public did not have vital facts which may have been very significant to their judgment of the narrator and the details he presented.
"Trust is at the heart of the relationship between a television network and its viewers, especially for a public service broadcaster such as the BBC.
"This error had the possibility to damage the very considerable levels of trust that audiences would have placed in a factual film from the broadcaster about the Gaza conflict."
The film was removed from the online platform in the month of February after the narrator's family links emerged, and in the month of July an internal BBC review concluded it violated the organization's editorial guidelines on accuracy.
A corporation official commented: "The authority's determination is in accordance with the conclusions of the internal assessment, that there was a serious error in the documentary in relation to the corporation's content standards on accuracy, which corresponds to clause 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we agree with the regulator's ruling in its entirety. We will adhere to the directive as soon as the schedule and language are confirmed."
