The public service broadcaster committed a "serious breach" of industry standards by failing to disclose that the presenter of a documentary about the Gaza situation was the offspring of a Hamas representative, as determined by UK media regulator Ofcom.
An probe by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the film was "substantially inaccurate".
The head of the BBC had earlier expressed regret, noting there had been "a significant failing in relation to factual correctness".
Ofcom has instructed the BBC to transmit a evening declaration about its conclusions.
"Since this amounts to a major infringement of our regulations, we are directing the corporation to transmit a announcement of our determinations against it on BBC Two at nine o'clock in the evening, with a timing to be determined," the statement read.
'Possibility to Erode Trust'
The watchdog's report said: "The inquiry we conducted found that the documentary's lack of disclosure that the voice's male guardian occupied a post in the Hamas-administered administration was substantially inaccurate.
"Consequently that the public did not have vital facts which may have been very significant to their judgment of the narrator and the information he presented.
"Credibility is at the center of the bond between a media organization and its public, particularly for a state-funded media outlet such as the public broadcaster.
"This failing had the possibility to erode the significantly high amounts of credibility that audiences would have placed in a BBC factual programme about the conflict in Gaza."
The film was pulled from the online platform in February after the boy's personal associations emerged, and in the month of July an internal BBC review found it violated the organization's journalistic standards on accuracy.
A BBC spokesperson commented: "The regulator's decision is in agreement 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 truthfulness, which aligns with clause 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we agree with Ofcom's decision in complete. We will adhere to the penalty as soon as the timing and language are confirmed."
