The BBC engaged in a "significant breach" of media regulations by failing to disclose that the voice of a film about the Gaza situation was the child of a Hamas official, as determined by UK media regulator Ofcom.
An probe by Ofcom into Gaza: How to Survive a Warzone has found that the film was "substantially inaccurate".
The BBC's director general had previously apologised, noting there had been "a major oversight in relation to truthfulness".
The authority has instructed the BBC to broadcast a evening announcement about its decisions.
"Since this amounts to a major infringement of our code, we are directing the broadcaster to air a announcement of our determinations against it on the BBC's second channel at 9pm, with a schedule to be confirmed," the regulator stated.
'Possibility to Damage Trust'
The authority's statement declared: "Our probe concluded that the programme's omission to reveal that the voice's father held a role in the Hamas-administered authority was materially misleading.
"Consequently that the viewers did not have critical information which may have been extremely pertinent to their judgment of the presenter and the information he shared.
"Trust is at the core of the bond between a television network and its viewers, especially for a public service broadcaster such as the BBC.
"This oversight had the risk to damage the significantly high degrees of credibility that the public would have put in a BBC factual programme about the conflict in Gaza."
The film was withdrawn from the online platform in February after the presenter's familial connections came to light, and in this past July an corporation's own inquiry concluded it infringed the corporation's content policies on accuracy.
A representative for the broadcaster said: "The Ofcom ruling is in agreement with the conclusions of the internal assessment, that there was a major oversight in the programme in relation to the corporation's content standards on factual correctness, which reflects Rule 2.2 of the regulator's media standards.
"We expressed regret for this and we agree with the regulator's ruling in complete. We will comply with the sanction as soon as the timing and wording are determined."
