The British broadcaster committed a "serious breach" of broadcasting rules by omitting to mention that the voice of a film about the Gaza situation was the offspring of a Hamas official, according to UK media regulator Ofcom.
An probe by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has found that the programme was "materially misleading".
The head of the BBC had previously apologised, noting there had been "a significant failing in relation to truthfulness".
The regulator has ordered the BBC to broadcast a peak-time statement about its findings.
"As this represents a major infringement of our rules, we are instructing the BBC to transmit a message of our findings against it on BBC Two at 21:00, with a schedule to be determined," the regulator stated.
'Risk to Erode Confidence'
The regulator's announcement said: "The inquiry we conducted found that the programme's lack of disclosure that the narrator's parent served in a role in the Hamas-controlled government was substantially inaccurate.
"Consequently that the public did not have vital facts which may have been extremely pertinent to their judgment of the presenter and the content he provided.
"Trust is at the center of the bond between a media organization and its viewers, notably for a state-funded media outlet such as the BBC.
"This error had the risk to undermine the very considerable levels of trust that audiences would have invested in a BBC factual programme about the Israel-Gaza war."
The film was removed from iPlayer in the month of February after the narrator's family links came to light, and in July an corporation's own inquiry found it violated the broadcaster's journalistic standards on truthfulness.
A corporation official said: "The authority's determination is in agreement with the findings of Peter Johnston's review, that there was a significant failing in the documentary in relation to the broadcaster's journalistic policies on accuracy, which reflects regulation 2.2 of the regulator's media standards.
"We issued an apology for this and we agree with the authority's determination in full. We will follow the directive as soon as the schedule and wording are finalised."
