The public service broadcaster committed a "major breach" of industry standards by not revealing that the presenter of a documentary about the Gaza conflict was the son of a Hamas administrator, as determined by British broadcasting authority Ofcom.
An inquiry by the media regulator into the documentary titled Gaza: How to Survive a Warzone has found that the film was "materially misleading".
The head of the BBC had earlier expressed regret, stating there had been "a major oversight in relation to accuracy".
Ofcom has ordered the BBC to air a evening declaration about its findings.
"Given this constitutes a major infringement of our code, we are ordering the BBC to broadcast a statement of our determinations against it on BBC2 at 21:00, with a date to be confirmed," it said.
'Potential to Undermine Trust'
The watchdog's announcement stated: "The inquiry we conducted determined that the programme's lack of disclosure that the voice's male guardian served in a role in the Hamas-controlled administration was materially misleading.
"It meant that the audience did not have critical information which may have been very significant to their judgment of the narrator and the information he presented.
"Credibility is at the heart of the connection between a media organization and its public, particularly for a national broadcasting corporation such as the British Broadcasting Corporation.
"This oversight had the potential to undermine the very considerable levels of confidence that viewers would have invested in a factual film from the broadcaster about the conflict in Gaza."
The film was withdrawn from iPlayer in the month of February after the narrator's familial connections came to light, and in the month of July an corporation's own inquiry concluded it breached the organization's content policies on accuracy.
A BBC spokesperson commented: "The regulator's decision is in line with the results of the internal assessment, that there was a serious error in the programme in relation to the BBC's Editorial Guidelines on factual correctness, which aligns with regulation 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we accept the authority's determination in its entirety. We will comply with the directive as soon as the date and wording are finalised."
