The British broadcaster was found to have committed a "significant breach" of industry standards by not revealing that the narrator of a documentary about Gaza was the son of a Hamas official, as determined by British broadcasting authority Ofcom.
An probe by the broadcasting watchdog into Gaza: How to Survive a Warzone has concluded that the documentary was "significantly deceptive".
The head of the BBC had previously apologised, noting there had been "a major oversight in relation to accuracy".
The regulator has ordered the corporation to broadcast a peak-time statement about its conclusions.
"Given this constitutes a significant violation of our regulations, we are instructing the broadcaster to air a message of our conclusions against it on BBC Two at 21:00, with a schedule to be confirmed," the regulator stated.
'Possibility to Undermine Confidence'
The watchdog's statement said: "The inquiry we conducted concluded that the programme's failure to disclose that the voice's father served in a position in the Hamas-run authority was materially misleading.
"It meant that the viewers did not have essential details which may have been highly relevant to their evaluation of the presenter and the information he shared.
"Confidence is at the center of the connection between a broadcaster and its audience, particularly for a public service broadcaster such as the public broadcaster.
"This oversight had the potential to undermine the exceptionally strong degrees of credibility that audiences would have put in a factual film from the broadcaster about the Israel-Gaza war."
The documentary was removed from the online platform in February after the narrator's personal associations were revealed, and in this past July an internal BBC review concluded it breached the broadcaster's editorial guidelines on factual correctness.
A representative for the broadcaster said: "The regulator's decision is in agreement with the findings of the corporation's inquiry, that there was a serious error in the film in relation to the BBC's Editorial Guidelines on factual correctness, which aligns with regulation 2.2 of the regulator's media standards.
"We expressed regret for this and we agree with the authority's determination in its entirety. We will follow the penalty as soon as the timing and language are confirmed."
