The public service broadcaster was found to have committed a "serious breach" of media regulations by omitting to mention that the narrator of a film about the Gaza situation was the son of a Hamas official, as determined by British broadcasting authority Ofcom.
An investigation by Ofcom into the documentary titled Gaza: How to Survive a Warzone has concluded that the programme was "substantially inaccurate".
The chief executive of the broadcaster had already issued an apology, saying there had been "a significant failing in relation to accuracy".
Ofcom has ordered the corporation to transmit a prime-time announcement about its decisions.
"Given this constitutes a major infringement of our regulations, we are instructing the broadcaster to air a message of our findings against it on BBC Two at 9pm, with a timing to be determined," the regulator stated.
'Possibility to Undermine Credibility'
The watchdog's report said: "The inquiry we conducted found that the documentary's lack of disclosure that the presenter's father served in a position in the Hamas-run administration was materially misleading.
"It meant that the viewers did not have essential details which may have been very significant to their judgment of the voice and the information he shared.
"Confidence is at the center of the relationship between a broadcaster and its public, particularly for a state-funded media outlet such as the British Broadcasting Corporation.
"This oversight had the potential to damage the very considerable degrees of credibility that the public would have put in a documentary produced by the BBC about the Gaza conflict."
The film was pulled from iPlayer in February after the boy's family links emerged, and in July an internal BBC review determined it infringed the organization's content policies on factual correctness.
A BBC spokesperson said: "The authority's determination is in agreement with the results of Peter Johnston's review, that there was a serious error in the programme in relation to the BBC's Editorial Guidelines on factual correctness, which aligns with Rule 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we agree with the authority's determination in full. We will comply with the penalty as soon as the date and wording are finalised."
