The British broadcaster engaged in a "serious breach" of media regulations by omitting to mention that the presenter of a documentary about the Gaza situation was the child of a Hamas representative, as ruled by UK media regulator Ofcom.
An inquiry by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has determined that the programme was "materially misleading".
The BBC's director general had previously apologised, saying there had been "a serious error in relation to factual correctness".
The authority has directed the corporation to transmit a prime-time declaration about its findings.
"Given this constitutes a significant violation of our rules, we are instructing the corporation to broadcast a announcement of our conclusions against it on the BBC's second channel at nine o'clock in the evening, with a schedule to be determined," it said.
'Potential to Erode Trust'
The regulator's statement stated: "Our probe found that the documentary's lack of disclosure that the presenter's male guardian held a position in the Hamas-controlled administration was substantially inaccurate.
"It meant that the viewers did not have essential details which may have been very significant to their evaluation of the narrator and the information he provided.
"Trust is at the core of the relationship between a media organization and its audience, notably for a state-funded media outlet such as the public broadcaster.
"This failing had the possibility to damage the very considerable levels of confidence that the public would have placed in a documentary produced by the BBC about the Gaza conflict."
The film was withdrawn from the BBC's streaming service in last February after the narrator's personal associations emerged, and in this past July an broadcaster's internal assessment determined it violated the corporation's content policies on factual correctness.
A representative for the broadcaster commented: "The regulator's decision is in agreement with the results of the internal assessment, that there was a serious error in the programme in relation to the broadcaster's journalistic policies on factual correctness, which corresponds to clause 2.2 of the regulator's media standards.
"We have apologised for this and we accept Ofcom's decision in its entirety. We will adhere to the sanction as soon as the timing and wording are finalised."
