The British broadcaster engaged in a "major breach" of broadcasting rules by not revealing that the narrator of a film about the Gaza conflict was the offspring of a Hamas official, as determined by UK media regulator Ofcom.
An investigation by the broadcasting watchdog into Gaza: How to Survive a Warzone has determined that the film was "materially misleading".
The BBC's director general had previously apologised, noting there had been "a serious error in relation to accuracy".
Ofcom has directed the broadcaster to broadcast a peak-time declaration about its conclusions.
"Since this amounts to a major infringement of our regulations, we are instructing the BBC to broadcast a statement of our findings against it on BBC Two at nine o'clock in the evening, with a timing to be determined," the statement read.
'Risk to Undermine Trust'
The authority's statement stated: "Our investigation concluded that the programme's lack of disclosure that the voice's parent occupied a position in the Hamas-controlled government was significantly deceptive.
"This implied that the audience did not have critical information which may have been highly relevant to their assessment of the narrator and the details he presented.
"Confidence is at the core of the bond between a television network and its audience, especially for a public service broadcaster such as the public broadcaster.
"This oversight had the risk to erode the significantly high amounts of trust that the public would have invested in a BBC factual programme about the conflict in Gaza."
The documentary was withdrawn from the online platform in the month of February after the presenter's personal associations emerged, and in this past July an broadcaster's internal assessment concluded it violated the corporation's editorial guidelines on accuracy.
A representative for the broadcaster stated: "The authority's determination is in line with the results of the corporation's inquiry, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on truthfulness, which reflects Rule 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we agree with the authority's determination in its entirety. We will follow the directive as soon as the schedule and wording are determined."
