The British broadcaster was found to have committed a "major breach" of media regulations by failing to disclose that the presenter of a programme about Gaza was the child of a Hamas official, as ruled by British broadcasting authority Ofcom.
An inquiry by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has determined that the programme was "significantly deceptive".
The head of the BBC had already issued an apology, noting there had been "a significant failing in relation to truthfulness".
The authority has ordered the BBC to air a prime-time declaration about its conclusions.
"Since this amounts to a serious breach of our rules, we are directing the broadcaster to broadcast a message of our findings against it on BBC Two at 21:00, with a timing to be confirmed," it said.
'Risk to Erode Confidence'
The regulator's statement said: "The inquiry we conducted determined that the documentary's omission to reveal that the narrator's male guardian occupied a role in the Hamas-run administration was materially misleading.
"Consequently that the public did not have vital facts which may have been extremely pertinent to their judgment of the presenter and the information he provided.
"Trust is at the center of the relationship between a broadcaster and its audience, particularly for a public service broadcaster such as the British Broadcasting Corporation.
"This error had the risk to erode the significantly high levels of confidence that audiences would have placed in a BBC factual programme about the Gaza conflict."
The film was removed from the online platform in February after the boy's familial connections were revealed, and in this past July an corporation's own inquiry found it infringed the organization's editorial guidelines on truthfulness.
A representative for the broadcaster said: "The authority's determination is in accordance with the findings of Peter Johnston's review, that there was a major oversight in the documentary in relation to the BBC's Editorial Guidelines on truthfulness, which corresponds to clause 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we comply with the regulator's ruling in full. We will adhere to the sanction as soon as the date and wording are confirmed."
