The British broadcaster was found to have committed a "serious breach" of industry standards by omitting to mention that the voice of a film about the Gaza situation was the son of a Hamas administrator, according to UK media regulator Ofcom.
An investigation by the broadcasting watchdog into Gaza: How to Survive a Warzone has determined that the documentary was "substantially inaccurate".
The chief executive of the broadcaster had previously apologised, noting there had been "a major oversight in relation to truthfulness".
The regulator has instructed the broadcaster to broadcast a peak-time statement about its findings.
"Given this constitutes a significant violation of our rules, we are instructing the BBC to transmit a statement of our findings against it on the BBC's second channel at nine o'clock in the evening, with a date to be determined," it said.
'Risk to Erode Trust'
The watchdog's announcement declared: "Our investigation found that the film's omission to reveal that the narrator's male guardian occupied a post in the Hamas-controlled authority was substantially inaccurate.
"It meant that the audience did not have critical information which may have been highly relevant to their assessment of the presenter and the content he presented.
"Credibility is at the core of the bond between a television network and its audience, especially for a public service broadcaster such as the public broadcaster.
"This oversight had the possibility to damage the significantly high degrees of trust that audiences would have put in a documentary produced by the BBC about the conflict in Gaza."
The documentary was withdrawn from the BBC's streaming service in last February after the presenter's personal associations came to light, and in the month of July an corporation's own inquiry determined it infringed the organization's journalistic standards on accuracy.
A corporation official said: "The authority's determination is in agreement with the findings of the internal assessment, that there was a serious error in the documentary in relation to the broadcaster's journalistic policies on truthfulness, which aligns with regulation 2.2 of the regulator's media standards.
"We have apologised for this and we agree with the authority's determination in its entirety. We will comply with the sanction as soon as the timing and wording are determined."
