The British broadcaster committed a "significant breach" of media regulations by failing to disclose that the voice of a programme about the Gaza situation was the offspring of a Hamas official, according to British broadcasting authority Ofcom.
An inquiry by Ofcom into the documentary titled Gaza: How to Survive a Warzone has determined that the film was "substantially inaccurate".
The BBC's director general had already issued an apology, saying there had been "a serious error in relation to accuracy".
The regulator has directed the broadcaster to broadcast a evening declaration about its decisions.
"As this represents a significant violation of our rules, we are ordering the broadcaster to air a message of our conclusions against it on BBC Two at nine o'clock in the evening, with a date to be finalised," the statement read.
'Possibility to Erode Trust'
The regulator's statement said: "Our probe determined that the programme's lack of disclosure that the narrator's male guardian occupied a role in the Hamas-administered administration was materially misleading.
"Consequently that the viewers did not have essential details which may have been extremely pertinent to their evaluation of the narrator and the content he shared.
"Credibility is at the center of the bond between a television network and its viewers, especially for a state-funded media outlet such as the public broadcaster.
"This error had the risk to erode the significantly high degrees of confidence that the public would have put in a documentary produced by the BBC about the Gaza conflict."
The film was withdrawn from the BBC's streaming service in the month of February after the narrator's personal associations emerged, and in this past July an corporation's own inquiry found it breached the corporation's content policies on accuracy.
A BBC spokesperson commented: "The regulator's decision is in agreement with the conclusions of the corporation's inquiry, that there was a serious error in the documentary in relation to the broadcaster's journalistic policies on truthfulness, which reflects regulation 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we accept the authority's determination in full. We will follow the directive as soon as the schedule and language are determined."
