The British broadcaster committed a "major breach" of industry standards by failing to disclose that the presenter of a documentary about the Gaza conflict was the son of a Hamas official, as ruled by UK media regulator Ofcom.
An inquiry by Ofcom into the programme Gaza: How to Survive a Warzone has determined that the programme was "significantly deceptive".
The head of the BBC had previously apologised, noting there had been "a major oversight in relation to factual correctness".
The regulator has ordered the BBC to transmit a peak-time statement about its findings.
"Given this constitutes a serious breach of our regulations, we are instructing the corporation to transmit a message of our conclusions against it on the BBC's second channel at 21:00, with a timing to be confirmed," it said.
'Potential to Undermine Trust'
The watchdog's statement declared: "Our probe found that the programme's failure to disclose that the narrator's father occupied a role in the Hamas-run authority was significantly deceptive.
"It meant that the public did not have essential details which may have been highly relevant to their judgment of the voice and the information he shared.
"Credibility is at the heart of the relationship between a media organization and its audience, notably for a national broadcasting corporation such as the public broadcaster.
"This error had the possibility to erode the exceptionally strong degrees of credibility that viewers would have invested in a BBC factual programme about the Israel-Gaza war."
The programme was removed from iPlayer in the month of February after the presenter's familial connections emerged, and in July an internal BBC review concluded it infringed the broadcaster's content policies on truthfulness.
A representative for the broadcaster said: "The authority's determination is in agreement with the findings of the corporation's inquiry, that there was a major oversight in the film in relation to the BBC's Editorial Guidelines on factual correctness, which aligns with clause 2.2 of the regulator's media standards.
"We expressed regret for this and we accept Ofcom's decision in full. We will follow the penalty as soon as the date and language are confirmed."
