The public service broadcaster committed a "major breach" of media regulations by omitting to mention that the presenter of a programme about the Gaza situation was the son of a Hamas representative, as determined by UK media regulator Ofcom.
An probe by Ofcom into Gaza: How to Survive a Warzone has concluded that the programme was "substantially inaccurate".
The chief executive of the broadcaster had already issued an apology, saying there had been "a serious error in relation to factual correctness".
The authority has directed the corporation to broadcast a prime-time statement about its findings.
"Given this constitutes a major infringement of our regulations, we are instructing the broadcaster to broadcast a announcement of our conclusions against it on BBC2 at nine o'clock in the evening, with a date to be confirmed," the regulator stated.
'Possibility to Erode Confidence'
The regulator's statement declared: "Our investigation found that the documentary's lack of disclosure that the voice's parent served in a post in the Hamas-run administration was significantly deceptive.
"Consequently that the audience did not have essential details which may have been highly relevant to their evaluation of the narrator and the details he presented.
"Trust is at the center of the connection between a television network and its audience, notably for a state-funded media outlet such as the BBC.
"This oversight had the risk to erode the very considerable degrees of trust that audiences would have placed in a documentary produced by the BBC about the Israel-Gaza war."
The documentary was pulled from iPlayer in February after the narrator's personal associations emerged, and in July an broadcaster's internal assessment concluded it violated the corporation's content policies on truthfulness.
A representative for the broadcaster said: "The authority's determination is in line with the results of the internal assessment, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to clause 2.2 of the regulator's media standards.
"We have apologised for this and we comply with the regulator's ruling in its entirety. We will follow the directive as soon as the date and wording are finalised."
