The public service broadcaster committed a "major breach" of industry standards by not revealing that the presenter of a film about Gaza was the son of a Hamas administrator, according to British broadcasting authority Ofcom.
An probe by Ofcom into the programme Gaza: How to Survive a Warzone has concluded that the film was "materially misleading".
The BBC's director general had previously apologised, noting there had been "a significant failing in relation to accuracy".
The regulator has instructed the broadcaster to air a peak-time statement about its decisions.
"Given this constitutes a major infringement of our regulations, we are instructing the BBC to air a announcement of our determinations against it on BBC Two at 9pm, with a timing to be confirmed," the regulator stated.
'Potential to Erode Confidence'
The regulator's report stated: "Our probe determined that the programme's omission to reveal that the presenter's male guardian held a role in the Hamas-administered authority was significantly deceptive.
"Consequently that the audience did not have critical information which may have been highly relevant to their assessment of the voice and the details he shared.
"Trust is at the center of the connection between a television network and its public, especially for a national broadcasting corporation such as the public broadcaster.
"This oversight had the potential to damage the exceptionally strong degrees of credibility that audiences would have placed in a factual film from the broadcaster about the conflict in Gaza."
The documentary was pulled from iPlayer in February after the narrator's family links were revealed, and in the month of July an corporation's own inquiry concluded it breached the broadcaster's journalistic standards on factual correctness.
A corporation official stated: "The regulator's decision is in accordance with the results of the corporation's inquiry, that there was a major oversight in the documentary in relation to the corporation's content standards on factual correctness, which reflects Rule 2.2 of the regulator's media standards.
"We issued an apology for this and we accept the regulator's ruling in its entirety. We will follow the penalty as soon as the date and wording are determined."
