The British broadcaster was found to have committed a "significant breach" of media regulations by failing to disclose that the voice of a programme about Gaza was the offspring of a Hamas administrator, as determined by British broadcasting authority Ofcom.
An investigation by Ofcom into the programme Gaza: How to Survive a Warzone has determined that the film was "substantially inaccurate".
The head of the BBC had already issued an apology, stating there had been "a serious error in relation to accuracy".
The authority has instructed the corporation to transmit a peak-time statement about its findings.
"Since this amounts to a serious breach of our code, we are instructing the broadcaster to transmit a message of our determinations against it on BBC2 at 9pm, with a schedule to be confirmed," the statement read.
'Possibility to Damage Credibility'
The authority's announcement said: "The inquiry we conducted found that the documentary's omission to reveal that the presenter's male guardian held a role in the Hamas-run government was substantially inaccurate.
"This implied that the public did not have critical information which may have been very significant to their judgment of the narrator and the information he shared.
"Credibility is at the heart of the bond between a media organization and its audience, especially for a public service broadcaster such as the public broadcaster.
"This failing had the possibility to erode the very considerable amounts of confidence that audiences would have invested in a BBC factual programme about the conflict in Gaza."
The programme was withdrawn from the online platform in the month of February after the narrator's personal associations emerged, and in this past July an internal BBC review concluded it violated the corporation's content policies on factual correctness.
A representative for the broadcaster said: "The Ofcom ruling is in agreement with the conclusions of Peter Johnston's review, that there was a major oversight in the documentary in relation to the BBC's Editorial Guidelines on accuracy, which corresponds to regulation 2.2 of the regulator's media standards.
"We expressed regret for this and we agree with the authority's determination in full. We will follow the directive as soon as the schedule and language are finalised."
