The BBC committed a "serious breach" of media regulations by not revealing that the presenter of a film about the Gaza conflict was the son of a Hamas administrator, as determined by British broadcasting authority Ofcom.
An inquiry by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has determined that the film was "significantly deceptive".
The BBC's director general had previously apologised, noting there had been "a significant failing in relation to factual correctness".
Ofcom has directed the corporation to air a peak-time declaration about its conclusions.
"As this represents a serious breach of our rules, we are instructing the corporation to transmit a statement of our findings against it on BBC Two at 9pm, with a date to be determined," the statement read.
'Potential to Erode Confidence'
The regulator's announcement declared: "The inquiry we conducted concluded that the programme's omission to reveal that the voice's male guardian occupied a role in the Hamas-run government was substantially inaccurate.
"It meant that the public did not have critical information which may have been very significant to their assessment of the presenter and the details he presented.
"Confidence is at the center of the bond between a broadcaster and its public, particularly for a state-funded media outlet such as the BBC.
"This oversight had the potential to undermine the significantly high levels of credibility that audiences would have placed in a factual film from the broadcaster about the Gaza conflict."
The film was pulled from the online platform in last February after the narrator's familial connections emerged, and in the month of July an broadcaster's internal assessment concluded it infringed the organization's content policies on factual correctness.
A BBC spokesperson said: "The Ofcom ruling is in agreement with the findings of the corporation's inquiry, that there was a serious error in the film in relation to the corporation's content standards on truthfulness, which reflects Rule 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we comply with Ofcom's decision in complete. We will adhere to the directive as soon as the schedule and wording are finalised."
