The British broadcaster engaged in a "major breach" of broadcasting rules by omitting to mention that the narrator of a programme about the Gaza conflict was the child of a Hamas representative, as determined by regulatory body Ofcom.
An probe by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has concluded that the film was "substantially inaccurate".
The BBC's director general had already issued an apology, saying there had been "a significant failing in relation to accuracy".
Ofcom has instructed the broadcaster to transmit a prime-time statement about its conclusions.
"Given this constitutes a serious breach of our code, we are instructing the BBC to transmit a message of our conclusions against it on BBC Two at 9pm, with a timing to be finalised," it said.
'Risk to Erode Confidence'
The authority's report stated: "Our probe determined that the documentary's failure to disclose that the voice's father occupied a position in the Hamas-run government was significantly deceptive.
"Consequently that the viewers did not have critical information which may have been very significant to their assessment of the presenter and the information he presented.
"Credibility is at the heart of the bond between a media organization and its audience, especially for a national broadcasting corporation such as the public broadcaster.
"This failing had the possibility to damage the very considerable levels of credibility that the public would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The film was removed from iPlayer in February after the presenter's personal associations emerged, and in the month of July an corporation's own inquiry concluded it infringed the organization's journalistic standards on truthfulness.
A representative for the broadcaster commented: "The regulator's decision is in line with the results of Peter Johnston's review, that there was a major oversight in the programme in relation to the broadcaster's journalistic policies on accuracy, which reflects Rule 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we accept the regulator's ruling in complete. We will follow the sanction as soon as the timing and wording are finalised."
