The public service broadcaster engaged in a "significant breach" of media regulations by omitting to mention that the presenter of a documentary about the Gaza conflict was the offspring of a Hamas official, as ruled by British broadcasting authority Ofcom.
An probe by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has determined that the film was "significantly deceptive".
The chief executive of the broadcaster had previously apologised, stating there had been "a major oversight in relation to accuracy".
Ofcom has directed the broadcaster to air a evening declaration about its decisions.
"Since this amounts to a significant violation of our code, we are directing the corporation to air a announcement of our determinations against it on BBC Two at 21:00, with a schedule to be determined," it said.
'Possibility to Undermine Confidence'
The watchdog's report said: "Our probe found that the film's omission to reveal that the narrator's parent held a post in the Hamas-administered authority was significantly deceptive.
"Consequently that the audience did not have essential details which may have been highly relevant to their evaluation of the narrator and the information he shared.
"Credibility is at the heart of the connection between a television network and its viewers, especially for a national broadcasting corporation such as the British Broadcasting Corporation.
"This failing had the possibility to damage the very considerable degrees of trust that audiences would have put in a factual film from the broadcaster about the conflict in Gaza."
The programme was withdrawn from iPlayer in last February after the narrator's family links were revealed, and in July an corporation's own inquiry found it breached the broadcaster's content policies on truthfulness.
A BBC spokesperson said: "The Ofcom ruling is in line with the findings of Peter Johnston's review, that there was a major oversight 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 issued an apology for this and we comply with the authority's determination in complete. We will follow the directive as soon as the date and wording are finalised."
