The British broadcaster committed a "significant breach" of media regulations by not revealing that the presenter of a documentary about Gaza was the son of a Hamas representative, as determined by regulatory body Ofcom.
An probe by the media regulator into Gaza: How to Survive a Warzone has determined that the documentary was "materially misleading".
The head of the BBC had earlier expressed regret, stating there had been "a serious error in relation to truthfulness".
The authority has ordered the broadcaster to air a evening statement about its decisions.
"Since this amounts to a major infringement of our regulations, we are ordering the corporation to air a statement of our determinations against it on BBC2 at 9pm, with a timing to be confirmed," the regulator stated.
'Risk to Undermine Trust'
The regulator's statement said: "The inquiry we conducted determined that the film's omission to reveal that the narrator's male guardian occupied a role in the Hamas-administered administration was materially misleading.
"This implied that the public did not have essential details which may have been highly relevant to their evaluation of the voice and the details he provided.
"Credibility is at the center of the relationship between a media organization and its public, notably for a national broadcasting corporation such as the public broadcaster.
"This failing had the risk to erode the exceptionally strong levels of credibility that audiences would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The documentary was removed from the online platform in February after the presenter's family links came to light, and in July an corporation's own inquiry concluded it infringed the corporation's editorial guidelines on truthfulness.
A BBC spokesperson said: "The Ofcom ruling is in agreement with the findings of the internal assessment, that there was a major oversight in the programme in relation to the BBC's Editorial Guidelines on truthfulness, which aligns with Rule 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we accept the authority's determination in complete. We will follow the directive as soon as the date and wording are finalised."
