The public service broadcaster committed a "major breach" of broadcasting rules by not revealing that the voice of a documentary about Gaza was the offspring of a Hamas administrator, according to regulatory body Ofcom.
An inquiry by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has found that the documentary was "substantially inaccurate".
The chief executive of the broadcaster had previously apologised, noting there had been "a significant failing in relation to factual correctness".
The regulator has ordered the broadcaster to broadcast a evening declaration about its conclusions.
"As this represents a major infringement of our regulations, we are directing the corporation 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," it said.
'Risk to Erode Trust'
The authority's announcement stated: "Our probe found that the programme's omission to reveal that the presenter's parent held a position in the Hamas-run administration was significantly deceptive.
"Consequently that the audience did not have essential details which may have been very significant to their assessment of the voice and the information he presented.
"Credibility is at the center of the relationship between a media organization and its audience, notably for a public service broadcaster such as the British Broadcasting Corporation.
"This failing had the potential to erode the very considerable amounts of trust that viewers would have placed in a documentary produced by the BBC about the Gaza conflict."
The film was withdrawn from the online platform in February after the presenter's family links came to light, and in July an corporation's own inquiry concluded it violated the broadcaster's content policies on accuracy.
A BBC spokesperson said: "The Ofcom ruling is in agreement with the conclusions of the internal assessment, that there was a significant failing in the documentary in relation to the broadcaster's journalistic policies on accuracy, which aligns with regulation 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we agree with the regulator's ruling in complete. We will adhere to the directive as soon as the schedule and language are determined."
