The public service broadcaster committed a "significant breach" of broadcasting rules by not revealing that the presenter of a documentary about the Gaza situation was the offspring of a Hamas representative, as ruled by British broadcasting authority Ofcom.
An probe by the broadcasting watchdog into Gaza: How to Survive a Warzone has concluded that the documentary was "substantially inaccurate".
The BBC's director general had previously apologised, stating there had been "a serious error in relation to accuracy".
Ofcom has directed the corporation to air a prime-time declaration about its decisions.
"As this represents a serious breach of our rules, we are directing the corporation to broadcast a announcement of our determinations against it on BBC Two at nine o'clock in the evening, with a schedule to be determined," the statement read.
'Possibility to Undermine Trust'
The watchdog's announcement said: "The inquiry we conducted determined that the film's failure to disclose that the presenter's father served in a role in the Hamas-run government was substantially inaccurate.
"Consequently that the viewers did not have essential details which may have been highly relevant to their assessment of the voice and the information he presented.
"Credibility is at the heart of the bond between a media organization and its public, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the risk to undermine the significantly high levels of credibility that the public would have placed in a documentary produced by the BBC about the conflict in Gaza."
The documentary was removed from the online platform in the month of February after the presenter's familial connections emerged, and in the month of July an broadcaster's internal assessment concluded it infringed the corporation's journalistic standards on truthfulness.
A BBC spokesperson said: "The Ofcom ruling is in line with the findings of the corporation's inquiry, that there was a serious error in the film in relation to the broadcaster's journalistic policies on factual correctness, which aligns with Rule 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we agree with Ofcom's decision in complete. We will comply with the directive as soon as the timing and wording are confirmed."
