The public service broadcaster engaged in a "significant breach" of media regulations by failing to disclose that the voice of a documentary about Gaza was the child of a Hamas official, as determined by UK media regulator Ofcom.
An investigation by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has found that the documentary was "materially misleading".
The BBC's director general had already issued an apology, stating there had been "a major oversight in relation to accuracy".
Ofcom has ordered the BBC to air a prime-time statement about its findings.
"Since this amounts to a serious breach of our regulations, we are instructing the corporation to air a message of our determinations against it on BBC Two at 21:00, with a date to be confirmed," the statement read.
'Potential to Undermine Trust'
The authority's announcement declared: "Our probe concluded that the film's lack of disclosure that the voice's male guardian occupied a post in the Hamas-administered authority was substantially inaccurate.
"Consequently that the public did not have vital facts which may have been extremely pertinent to their evaluation of the voice and the details he shared.
"Confidence is at the heart of the bond between a media organization and its viewers, particularly for a national broadcasting corporation such as the BBC.
"This failing had the potential to undermine the very considerable amounts of trust that viewers would have put in a factual film from the broadcaster about the Gaza conflict."
The documentary was removed from the BBC's streaming service in last February after the boy's personal associations came to light, and in the month of July an broadcaster's internal assessment concluded it breached the broadcaster's journalistic standards on truthfulness.
A representative for the broadcaster said: "The Ofcom ruling is in agreement with the findings of Peter Johnston's review, that there was a major oversight in the film in relation to the corporation's content standards on accuracy, which aligns with clause 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept the authority's determination in full. We will adhere to the directive as soon as the date and wording are determined."
