The British broadcaster was found to have committed a "serious breach" of industry standards by failing to disclose that the presenter of a film about the Gaza conflict was the son of a Hamas representative, as determined 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 previously apologised, noting there had been "a significant failing in relation to accuracy".
Ofcom has directed the BBC to broadcast a prime-time announcement about its conclusions.
"Given this constitutes a serious breach of our regulations, we are instructing the broadcaster to transmit a message of our conclusions against it on the BBC's second channel at 21:00, with a schedule to be finalised," the regulator stated.
'Risk to Damage Confidence'
The regulator's statement said: "The inquiry we conducted concluded that the programme's omission to reveal that the narrator's parent served in a post in the Hamas-run government was significantly deceptive.
"It meant that the public did not have critical information which may have been very significant to their evaluation of the narrator and the details he shared.
"Confidence is at the core of the bond between a media organization and its public, particularly for a state-funded media outlet such as the BBC.
"This failing had the potential to undermine the exceptionally strong amounts of credibility that the public would have put in a factual film from the broadcaster about the conflict in Gaza."
The documentary was pulled from the online platform in last February after the presenter's familial connections came to light, and in the month of July an broadcaster's internal assessment determined it breached the broadcaster's journalistic standards on factual correctness.
A representative for the broadcaster said: "The regulator's decision is in agreement with the results of the internal assessment, that there was a significant failing in the documentary in relation to the BBC's Editorial Guidelines on accuracy, which reflects clause 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we accept Ofcom's decision in complete. We will adhere to the penalty as soon as the schedule and wording are finalised."
