The British broadcaster committed a "major breach" of industry standards by failing to disclose that the narrator of a film about the Gaza conflict was the offspring of a Hamas official, according to regulatory body Ofcom.
An investigation by Ofcom into the programme Gaza: How to Survive a Warzone has determined that the documentary was "significantly deceptive".
The chief executive of the broadcaster had already issued an apology, noting there had been "a major oversight in relation to factual correctness".
The authority has ordered the corporation to air a prime-time declaration about its conclusions.
"Since this amounts to a major infringement of our code, we are instructing the corporation to broadcast a message of our determinations against it on BBC Two at nine o'clock in the evening, with a timing to be finalised," the regulator stated.
'Possibility to Undermine Confidence'
The watchdog's report declared: "Our probe determined that the documentary's lack of disclosure that the presenter's parent served in a post in the Hamas-controlled government was materially misleading.
"Consequently that the viewers did not have vital facts which may have been extremely pertinent to their evaluation of the narrator and the details he presented.
"Trust is at the center of the connection between a broadcaster and its audience, especially for a national broadcasting corporation such as the British Broadcasting Corporation.
"This oversight had the potential to erode the exceptionally strong amounts of credibility that the public would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The film was withdrawn from iPlayer in last February after the boy's familial connections came to light, and in the month of July an corporation's own inquiry concluded it infringed the broadcaster's journalistic standards on truthfulness.
A representative for the broadcaster commented: "The Ofcom ruling is in line with the findings of the internal assessment, that there was a significant failing in the film in relation to the corporation's content standards on truthfulness, which corresponds to clause 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we accept the regulator's ruling in its entirety. We will follow the directive as soon as the schedule and wording are determined."
