The British broadcaster committed a "major breach" of broadcasting rules by not revealing that the presenter of a programme about Gaza was the son of a Hamas representative, as ruled by UK media regulator Ofcom.
An inquiry by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the programme was "significantly deceptive".
The BBC's director general had earlier expressed regret, saying there had been "a significant failing in relation to truthfulness".
Ofcom has instructed the broadcaster to broadcast a peak-time statement about its findings.
"Since this amounts to a major infringement of our rules, we are directing the corporation to transmit a statement of our determinations against it on BBC Two at 9pm, with a date to be finalised," the regulator stated.
'Potential to Undermine Credibility'
The watchdog's report stated: "The inquiry we conducted found that the film's failure to disclose that the narrator's father held a role in the Hamas-run authority was significantly deceptive.
"This implied that the viewers did not have critical information which may have been extremely pertinent to their assessment of the voice and the information he provided.
"Credibility is at the core of the bond between a television network and its public, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the possibility to undermine the significantly high amounts of credibility that viewers would have put in a factual film from the broadcaster about the Gaza conflict."
The documentary was pulled from the BBC's streaming service in the month of February after the presenter's familial connections came to light, and in July an corporation's own inquiry determined it infringed the corporation's editorial guidelines on accuracy.
A representative for the broadcaster said: "The authority's determination is in agreement with the findings of the internal assessment, that there was a serious error in the programme in relation to the corporation's content standards on accuracy, which reflects clause 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we accept Ofcom's decision in complete. We will follow the sanction as soon as the schedule and wording are finalised."
