The BBC engaged in a "major breach" of industry standards by omitting to mention that the voice of a film about Gaza was the child of a Hamas representative, as ruled by UK media regulator Ofcom.
An probe by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has determined that the film was "significantly deceptive".
The chief executive of the broadcaster had earlier expressed regret, noting there had been "a significant failing in relation to truthfulness".
Ofcom has instructed the BBC to broadcast a peak-time announcement about its decisions.
"Since this amounts to a serious breach of our code, we are instructing the corporation to transmit a statement of our determinations against it on BBC2 at 21:00, with a schedule to be confirmed," the statement read.
'Risk to Undermine Trust'
The watchdog's report declared: "Our probe found that the film's lack of disclosure that the voice's male guardian held a post in the Hamas-run authority was substantially inaccurate.
"Consequently that the public did not have essential details which may have been extremely pertinent to their assessment of the voice and the details he presented.
"Credibility is at the heart of the bond between a media organization and its audience, notably for a national broadcasting corporation such as the public broadcaster.
"This failing had the risk to undermine the very considerable degrees of confidence that viewers would have placed in a factual film from the broadcaster about the Gaza conflict."
The programme was pulled from the BBC's streaming service in February after the presenter's personal associations were revealed, and in July an internal BBC review determined it infringed the corporation's content policies on truthfulness.
A corporation official stated: "The regulator's decision is in accordance with the conclusions of the corporation's inquiry, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on accuracy, which corresponds to regulation 2.2 of the regulator's media standards.
"We have apologised for this and we comply with Ofcom's decision in full. We will follow the sanction as soon as the timing and wording are determined."
