The BBC engaged in a "major breach" of media regulations by not revealing that the voice of a film about the Gaza conflict was the offspring of a Hamas representative, according to regulatory body Ofcom.
An probe by Ofcom into the programme Gaza: How to Survive a Warzone has determined that the documentary was "materially misleading".
The chief executive of the broadcaster had already issued an apology, saying there had been "a significant failing in relation to factual correctness".
Ofcom has instructed the broadcaster to air a prime-time announcement about its decisions.
"Since this amounts to a significant violation of our code, we are directing the corporation to transmit a statement of our determinations against it on BBC Two at 9pm, with a schedule to be finalised," it said.
'Risk to Undermine Trust'
The regulator's announcement declared: "Our investigation found that the film's omission to reveal that the narrator's parent held a role in the Hamas-controlled government was materially misleading.
"It meant that the audience did not have critical information which may have been very significant to their assessment of the voice and the information he provided.
"Confidence is at the core of the connection between a broadcaster and its public, particularly for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the risk to erode the exceptionally strong amounts of confidence that the public would have invested in a documentary produced by the BBC about the Gaza conflict."
The documentary was removed from iPlayer in February after the boy's familial connections were revealed, and in this past July an broadcaster's internal assessment found it infringed the organization's content policies on accuracy.
A representative for the broadcaster stated: "The authority's determination is in agreement with the results of the internal assessment, that there was a major oversight in the film in relation to the corporation's content standards on truthfulness, which corresponds to clause 2.2 of the regulator's media standards.
"We expressed regret for this and we accept the regulator's ruling in complete. We will follow the directive as soon as the date and language are determined."
