The British broadcaster committed a "significant breach" of broadcasting rules by not revealing that the presenter of a documentary about the Gaza conflict was the child of a Hamas official, according to UK media regulator Ofcom.
An investigation by Ofcom into Gaza: How to Survive a Warzone has determined that the programme was "materially misleading".
The chief executive of the broadcaster had already issued an apology, saying there had been "a significant failing in relation to truthfulness".
The authority has ordered the broadcaster to air a evening declaration about its findings.
"As this represents a serious breach of our rules, we are instructing the broadcaster to broadcast a statement of our findings against it on BBC2 at 9pm, with a date to be determined," it said.
'Possibility to Damage Credibility'
The authority's statement stated: "Our investigation determined that the film's failure to disclose that the narrator's father occupied a position in the Hamas-controlled authority was substantially inaccurate.
"It meant that the audience did not have critical information which may have been very significant to their evaluation of the voice and the content he provided.
"Confidence is at the heart of the bond between a media organization and its public, particularly for a public service broadcaster such as the public broadcaster.
"This error had the possibility to erode the significantly high degrees of trust that viewers would have put in a factual film from the broadcaster about the Gaza conflict."
The programme was pulled from the BBC's streaming service in the month of February after the narrator's personal associations were revealed, and in the month of July an broadcaster's internal assessment determined it infringed the corporation's editorial guidelines on factual correctness.
A corporation official said: "The Ofcom ruling is in agreement with the findings of the internal assessment, that there was a serious error in the programme in relation to the corporation's content standards on accuracy, which aligns with Rule 2.2 of the regulator's media standards.
"We expressed regret for this and we agree with Ofcom's decision in full. We will follow the sanction as soon as the date and wording are determined."
