The BBC committed a "major breach" of broadcasting rules by failing to disclose that the presenter of a documentary about Gaza was the child of a Hamas representative, as ruled by British broadcasting authority Ofcom.
An probe by the broadcasting watchdog into Gaza: How to Survive a Warzone has determined that the film was "substantially inaccurate".
The BBC's director general had already issued an apology, saying there had been "a serious error in relation to factual correctness".
The regulator has ordered the BBC to broadcast a prime-time declaration about its decisions.
"Since this amounts to a significant violation of our regulations, we are instructing the broadcaster to transmit a announcement of our conclusions against it on the BBC's second channel at nine o'clock in the evening, with a timing to be confirmed," the statement read.
'Risk to Damage Confidence'
The regulator's announcement stated: "The inquiry we conducted concluded that the film's lack of disclosure that the voice's father occupied a role in the Hamas-run authority was significantly deceptive.
"This implied that the public did not have essential details which may have been highly relevant to their evaluation of the presenter and the details he provided.
"Confidence is at the core of the connection between a media organization and its public, especially for a public service broadcaster such as the British Broadcasting Corporation.
"This oversight had the potential to undermine the significantly high amounts of confidence that audiences would have placed in a documentary produced by the BBC about the Israel-Gaza war."
The film was pulled from iPlayer in the month of February after the narrator's personal associations came to light, and in this past July an broadcaster's internal assessment concluded it violated the organization's content policies on factual correctness.
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 BBC's Editorial Guidelines on truthfulness, which aligns with Rule 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we agree with Ofcom's decision in complete. We will follow the penalty as soon as the date and wording are finalised."
