The public service broadcaster committed a "serious breach" of media regulations by not revealing that the presenter of a film about the Gaza situation was the son of a Hamas representative, according to UK media regulator Ofcom.
An investigation by the media regulator into the programme Gaza: How to Survive a Warzone has found that the film was "substantially inaccurate".
The chief executive of the broadcaster had previously apologised, saying there had been "a major oversight in relation to factual correctness".
The regulator has directed the BBC to broadcast a evening statement about its conclusions.
"As this represents a serious breach of our regulations, we are directing the corporation to broadcast a message of our findings against it on BBC2 at 21:00, with a schedule to be confirmed," it said.
'Potential to Erode Confidence'
The regulator's announcement said: "Our investigation determined that the programme's omission to reveal that the narrator's parent held a post in the Hamas-run administration was substantially inaccurate.
"It meant that the viewers did not have essential details which may have been highly relevant to their evaluation of the presenter and the information he provided.
"Confidence is at the heart of the relationship between a broadcaster and its audience, particularly for a national broadcasting corporation such as the British Broadcasting Corporation.
"This error had the possibility to undermine the very considerable amounts of credibility that the public would have placed in a documentary produced by the BBC about the Israel-Gaza war."
The documentary was removed from the online platform in the month of February after the narrator's familial connections were revealed, and in July an internal BBC review determined it violated the corporation's journalistic standards on truthfulness.
A corporation official said: "The authority's determination is in accordance with the conclusions of Peter Johnston's review, that there was a significant failing in the film in relation to the BBC's Editorial Guidelines on factual correctness, which aligns with Rule 2.2 of the regulator's media standards.
"We have apologised for this and we accept the regulator's ruling in complete. We will adhere to the penalty as soon as the schedule and language are determined."
