The BBC was found to have committed a "serious breach" of broadcasting rules by failing to disclose that the voice of a film about the Gaza conflict was the child of a Hamas representative, as determined by regulatory body Ofcom.
An probe by the broadcasting watchdog into Gaza: How to Survive a Warzone has found that the documentary was "substantially inaccurate".
The chief executive of the broadcaster had already issued an apology, noting there had been "a significant failing in relation to factual correctness".
The regulator has directed the broadcaster to air a peak-time statement about its conclusions.
"As this represents a significant violation of our code, we are ordering the BBC to air a announcement of our conclusions against it on BBC Two at 21:00, with a date to be confirmed," it said.
'Possibility to Damage Confidence'
The watchdog's report said: "Our investigation concluded that the film's lack of disclosure that the voice's father held a post in the Hamas-run authority was materially misleading.
"This implied that the public did not have essential details which may have been very significant to their assessment of the narrator and the details he provided.
"Confidence is at the core of the bond between a media organization and its viewers, especially for a national broadcasting corporation such as the British Broadcasting Corporation.
"This error had the possibility to damage the very considerable levels of confidence that the public would have placed in a factual film from the broadcaster about the conflict in Gaza."
The programme was pulled from the online platform in last February after the presenter's familial connections were revealed, and in this past July an internal BBC review determined it violated the organization's editorial guidelines on truthfulness.
A corporation official said: "The Ofcom ruling is in accordance with the findings of the internal assessment, that there was a serious error in the documentary in relation to the broadcaster's journalistic policies on truthfulness, which reflects Rule 2.2 of the regulator's media standards.
"We have apologised for this and we accept the regulator's ruling in its entirety. We will adhere to the directive as soon as the date and wording are finalised."
