The BBC was found to have committed a "significant breach" of broadcasting rules by failing to disclose that the narrator of a film about Gaza was the child of a Hamas administrator, as determined by regulatory body Ofcom.
An investigation by Ofcom into the documentary titled Gaza: How to Survive a Warzone has determined that the film was "substantially inaccurate".
The chief executive of the broadcaster had previously apologised, stating there had been "a major oversight in relation to accuracy".
The authority has directed the BBC to broadcast a peak-time declaration about its conclusions.
"As this represents a significant violation of our rules, we are ordering the broadcaster to broadcast a message of our findings against it on BBC Two at nine o'clock in the evening, with a schedule to be finalised," the regulator stated.
'Risk to Damage Trust'
The watchdog's announcement said: "The inquiry we conducted determined that the programme's lack of disclosure that the narrator's male guardian served in a position in the Hamas-run 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 presenter and the information he shared.
"Confidence is at the core of the bond between a television network and its viewers, especially for a public service broadcaster such as the British Broadcasting Corporation.
"This failing had the risk to undermine the exceptionally strong amounts of trust that viewers would have placed in a documentary produced by the BBC about the Israel-Gaza war."
The documentary was withdrawn from iPlayer in February after the presenter's family links were revealed, and in the month of July an broadcaster's internal assessment concluded it infringed the broadcaster's journalistic standards on accuracy.
A corporation official commented: "The Ofcom ruling 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 truthfulness, which reflects regulation 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept the regulator's ruling in its entirety. We will comply with the sanction as soon as the timing and language are determined."
