The public service broadcaster engaged in a "serious breach" of industry standards by failing to disclose that the narrator of a documentary about Gaza was the child of a Hamas representative, according to regulatory body Ofcom.
An inquiry by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has found that the programme was "materially misleading".
The BBC's director general had previously apologised, noting there had been "a major oversight in relation to truthfulness".
The regulator has ordered the corporation to air a evening statement about its findings.
"Since this amounts to a serious breach of our code, we are instructing the broadcaster to transmit a statement of our conclusions against it on the BBC's second channel at nine o'clock in the evening, with a schedule to be confirmed," the statement read.
'Risk to Undermine Credibility'
The regulator's statement stated: "Our probe concluded that the programme's failure to disclose that the presenter's male guardian held a position in the Hamas-run government was materially misleading.
"This implied that the audience did not have critical information which may have been highly relevant to their evaluation of the voice and the details he presented.
"Confidence is at the center of the bond between a media organization and its viewers, particularly for a public service broadcaster such as the BBC.
"This oversight had the risk to damage the significantly high amounts of confidence that the public would have put in a BBC factual programme about the conflict in Gaza."
The programme was pulled from the online platform in February after the boy's personal associations were revealed, and in July an broadcaster's internal assessment determined it breached the broadcaster's editorial guidelines on truthfulness.
A corporation official said: "The authority's determination is in line with the findings of the internal assessment, that there was a major oversight in the film in relation to the broadcaster's journalistic policies on factual correctness, which reflects Rule 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we comply with the regulator's ruling in complete. We will adhere to the penalty as soon as the date and language are confirmed."
