The British broadcaster was found to have committed a "major breach" of industry standards by omitting to mention that the narrator of a programme about Gaza was the son of a Hamas representative, as ruled by British broadcasting authority Ofcom.
An inquiry by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the documentary was "substantially inaccurate".
The head of the BBC had already issued an apology, saying there had been "a serious error in relation to truthfulness".
Ofcom has ordered the broadcaster to air a prime-time announcement about its conclusions.
"Given this constitutes a serious breach of our rules, we are ordering the BBC to transmit a announcement of our conclusions against it on BBC2 at nine o'clock in the evening, with a timing to be confirmed," the regulator stated.
'Potential to Damage Credibility'
The watchdog's statement said: "Our investigation concluded that the programme's lack of disclosure that the voice's parent held a post in the Hamas-run authority was materially misleading.
"Consequently that the public did not have essential details which may have been extremely pertinent to their judgment of the narrator and the details he presented.
"Confidence is at the heart of the relationship between a media organization and its audience, particularly for a public service broadcaster such as the BBC.
"This error had the risk to damage the significantly high degrees of confidence that the public would have placed in a BBC factual programme about the conflict in Gaza."
The film was removed from the online platform in February after the boy's family links were revealed, and in this past July an internal BBC review found it infringed the organization's journalistic standards on accuracy.
A BBC spokesperson commented: "The Ofcom ruling is in accordance with the findings of Peter Johnston's review, that there was a significant failing in the programme in relation to the broadcaster's journalistic policies on factual correctness, which reflects regulation 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we agree with the authority's determination in its entirety. We will follow the directive as soon as the schedule and wording are confirmed."
