The public service broadcaster committed a "serious breach" of industry standards by omitting to mention that the voice of a documentary about the Gaza situation was the offspring of a Hamas official, as determined by regulatory body Ofcom.
An inquiry by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has determined that the film was "substantially inaccurate".
The chief executive of the broadcaster had earlier expressed regret, stating there had been "a significant failing in relation to truthfulness".
The authority has ordered the broadcaster to air a prime-time announcement about its conclusions.
"Given this constitutes a significant violation of our code, we are instructing the BBC to transmit a announcement of our findings against it on BBC Two at 21:00, with a date to be determined," it said.
'Possibility to Undermine Trust'
The watchdog's announcement declared: "Our investigation concluded that the documentary's failure to disclose that the presenter's parent held a position in the Hamas-run administration was substantially inaccurate.
"Consequently that the public did not have essential details which may have been very significant to their judgment of the narrator and the content he presented.
"Confidence is at the center of the bond between a broadcaster and its viewers, notably for a public service broadcaster such as the British Broadcasting Corporation.
"This error had the potential to erode the very considerable degrees of credibility that the public would have put in a BBC factual programme about the conflict in Gaza."
The documentary was withdrawn from the online platform in last February after the narrator's familial connections were revealed, and in the month of July an corporation's own inquiry determined it breached the broadcaster's editorial guidelines on factual correctness.
A corporation official commented: "The regulator's decision is in accordance with the conclusions of the internal assessment, that there was a serious error in the film in relation to the corporation's content standards on factual correctness, which aligns with regulation 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we agree with the regulator's ruling in full. We will follow the sanction as soon as the date and wording are finalised."
