The BBC committed a "significant breach" of broadcasting rules by not revealing that the voice of a film about the Gaza conflict was the child of a Hamas administrator, as determined by regulatory body Ofcom.
An probe by the media regulator into the documentary titled Gaza: How to Survive a Warzone has concluded that the programme was "substantially inaccurate".
The chief executive of the broadcaster had already issued an apology, noting there had been "a significant failing in relation to factual correctness".
Ofcom has ordered the corporation to broadcast a evening announcement about its findings.
"Given this constitutes a serious breach of our regulations, we are instructing the broadcaster to transmit a message of our determinations against it on BBC Two at 21:00, with a timing to be confirmed," the regulator stated.
'Potential to Undermine Credibility'
The regulator's statement said: "The inquiry we conducted determined that the film's failure to disclose that the voice's male guardian occupied a post in the Hamas-run government was materially misleading.
"Consequently that the audience did not have essential details which may have been highly relevant to their judgment of the narrator and the information he shared.
"Trust is at the heart of the relationship between a media organization and its public, especially for a public service broadcaster such as the British Broadcasting Corporation.
"This oversight had the potential to erode the very considerable levels of trust that the public would have put in a factual film from the broadcaster about the Israel-Gaza war."
The programme was pulled from iPlayer in last February after the boy's family links came to light, and in July an internal BBC review found it breached the corporation's editorial guidelines on factual correctness.
A corporation official stated: "The authority's determination is in accordance with the conclusions of the corporation's inquiry, that there was a major oversight in the film in relation to the broadcaster's journalistic policies on factual correctness, which reflects clause 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we agree with the regulator's ruling in full. We will adhere to the penalty as soon as the date and language are confirmed."
