The BBC committed a "major breach" of industry standards by omitting to mention that the voice of a film about the Gaza situation was the son of a Hamas representative, as determined by UK media regulator Ofcom.
An probe by Ofcom into the programme Gaza: How to Survive a Warzone has found that the film was "materially misleading".
The BBC's director general had previously apologised, noting there had been "a major oversight in relation to accuracy".
The authority has instructed the BBC to transmit a prime-time declaration about its decisions.
"Since this amounts to a major infringement of our regulations, we are instructing the BBC to broadcast a announcement of our determinations against it on the BBC's second channel at 21:00, with a schedule to be determined," the statement read.
'Risk to Undermine Confidence'
The authority's statement declared: "Our investigation determined that the programme's lack of disclosure that the narrator's father served in a position in the Hamas-administered authority was substantially inaccurate.
"This implied that the viewers did not have vital facts which may have been highly relevant to their assessment of the presenter and the details he shared.
"Credibility is at the heart of the connection between a television network and its audience, notably for a public service broadcaster such as the BBC.
"This oversight had the possibility to damage the significantly high amounts of credibility that the public would have put in a BBC factual programme about the Israel-Gaza war."
The programme was removed from iPlayer in February after the boy's familial connections were revealed, and in this past July an corporation's own inquiry concluded it breached the organization's content policies on factual correctness.
A BBC spokesperson said: "The Ofcom ruling is in agreement with the results 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 clause 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we accept Ofcom's decision in its entirety. We will follow the directive as soon as the timing and wording are confirmed."
