The public service broadcaster engaged in a "serious breach" of industry standards by failing to disclose that the voice of a documentary about the Gaza situation was the son of a Hamas administrator, as ruled by British broadcasting authority Ofcom.
An investigation by the broadcasting watchdog into Gaza: How to Survive a Warzone has concluded that the documentary was "materially misleading".
The BBC's director general had previously apologised, saying there had been "a serious error in relation to accuracy".
Ofcom has instructed the BBC to transmit a evening statement about its decisions.
"Given this constitutes a significant violation of our rules, we are instructing the corporation to broadcast a statement of our conclusions against it on BBC Two at nine o'clock in the evening, with a date to be determined," the statement read.
'Potential to Erode Trust'
The watchdog's statement stated: "Our probe found that the programme's omission to reveal that the voice's father held a position in the Hamas-administered administration was materially misleading.
"It meant that the public did not have vital facts which may have been extremely pertinent to their evaluation of the narrator and the information he shared.
"Credibility is at the core of the connection between a television network and its audience, particularly for a national broadcasting corporation such as the BBC.
"This oversight had the possibility to undermine the significantly high amounts of trust that viewers would have placed in a BBC factual programme about the Gaza conflict."
The programme was withdrawn from iPlayer in the month of February after the narrator's familial connections came to light, and in July an internal BBC review found it infringed the broadcaster's journalistic standards on factual correctness.
A representative for the broadcaster stated: "The Ofcom ruling is in line with the findings of the corporation's inquiry, that there was a significant failing in the programme in relation to the broadcaster's journalistic policies on accuracy, which aligns with clause 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we comply with the regulator's ruling in full. We will adhere to the penalty as soon as the date and wording are confirmed."
