The British broadcaster was found to have committed a "major breach" of industry standards by omitting to mention that the narrator of a film about the Gaza conflict was the offspring of a Hamas official, according to British broadcasting authority Ofcom.
An inquiry by Ofcom into the programme Gaza: How to Survive a Warzone has found that the programme was "materially misleading".
The BBC's director general had already issued an apology, noting there had been "a significant failing in relation to accuracy".
The regulator has ordered the corporation to broadcast a prime-time declaration about its findings.
"As this represents a significant violation of our rules, we are instructing the BBC to transmit a statement of our conclusions against it on the BBC's second channel at 9pm, with a schedule to be determined," it said.
'Risk to Undermine Confidence'
The watchdog's announcement said: "The inquiry we conducted concluded that the documentary's lack of disclosure that the voice's parent served in a post in the Hamas-administered administration was substantially inaccurate.
"This implied that the viewers did not have essential details which may have been highly relevant to their assessment of the presenter and the information he shared.
"Trust is at the center of the connection between a broadcaster and its audience, particularly for a national broadcasting corporation such as the BBC.
"This error had the potential to erode the significantly high amounts of confidence that viewers would have placed in a documentary produced by the BBC about the Gaza conflict."
The programme was pulled from iPlayer in the month of February after the narrator's familial connections were revealed, and in this past July an internal BBC review concluded it infringed the organization's editorial guidelines on accuracy.
A representative for the broadcaster commented: "The Ofcom ruling is in agreement with the findings of the corporation's inquiry, that there was a significant failing in the film in relation to the corporation's content standards on truthfulness, which reflects Rule 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept Ofcom's decision in its entirety. We will adhere to the directive as soon as the schedule and wording are confirmed."
