The British broadcaster was found to have committed a "significant breach" of broadcasting rules by omitting to mention that the presenter of a programme about the Gaza conflict was the son of a Hamas official, as determined by British broadcasting authority Ofcom.
An probe by the broadcasting watchdog into Gaza: How to Survive a Warzone has concluded that the programme was "substantially inaccurate".
The BBC's director general had previously apologised, saying there had been "a serious error in relation to accuracy".
Ofcom has ordered the corporation to broadcast a peak-time statement about its conclusions.
"As this represents a serious breach of our code, we are instructing the corporation to air a announcement of our findings against it on BBC2 at 9pm, with a date to be finalised," the regulator stated.
'Possibility to Damage Confidence'
The authority's statement declared: "The inquiry we conducted found that the programme's failure to disclose that the narrator's male guardian served in a position in the Hamas-administered authority was significantly deceptive.
"It meant that the public did not have vital facts which may have been highly relevant to their judgment of the voice and the information he provided.
"Credibility is at the core of the connection between a media organization and its public, notably for a public service broadcaster such as the public broadcaster.
"This oversight had the risk to undermine the very considerable degrees of credibility that audiences would have invested in a BBC factual programme about the Gaza conflict."
The documentary was pulled from the online platform in last February after the presenter's personal associations came to light, and in July an corporation's own inquiry found it breached the broadcaster's journalistic standards on accuracy.
A representative for the broadcaster commented: "The regulator's decision is in accordance with the conclusions of Peter Johnston's review, that there was a major oversight in the programme in relation to the corporation's content standards on factual correctness, which corresponds to clause 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we agree with Ofcom's decision in its entirety. We will follow the sanction as soon as the date and wording are finalised."
