The public service broadcaster committed a "significant breach" of broadcasting rules by omitting to mention that the voice of a film about the Gaza conflict was the offspring of a Hamas representative, as ruled by British broadcasting authority Ofcom.
An inquiry by the broadcasting watchdog into Gaza: How to Survive a Warzone has found that the programme was "significantly deceptive".
The chief executive of the broadcaster had already issued an apology, stating there had been "a major oversight in relation to truthfulness".
The regulator has ordered the broadcaster to air a evening statement about its findings.
"Since this amounts to a major infringement of our rules, we are directing the corporation to broadcast a announcement of our conclusions against it on BBC Two at 9pm, with a schedule to be confirmed," the statement read.
'Risk to Undermine Trust'
The regulator's announcement said: "Our probe found that the documentary's lack of disclosure that the voice's parent occupied a role in the Hamas-run authority was significantly deceptive.
"This implied that the viewers did not have critical information which may have been very significant to their assessment of the voice and the details he provided.
"Credibility is at the core of the connection between a media organization and its public, notably for a state-funded media outlet such as the BBC.
"This error had the potential to erode the very considerable amounts of credibility that audiences would have placed in a BBC factual programme about the conflict in Gaza."
The film was removed from the BBC's streaming service in the month of February after the narrator's personal associations were revealed, and in this past July an internal BBC review determined it breached the broadcaster's editorial guidelines on truthfulness.
A BBC spokesperson commented: "The Ofcom ruling is in line with the results of Peter Johnston's review, that there was a serious error in the documentary in relation to the corporation's content standards on factual correctness, which corresponds to regulation 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we comply with Ofcom's decision in its entirety. We will adhere to the directive as soon as the timing and wording are confirmed."
