The BBC was found to have committed a "significant breach" of media regulations by failing to disclose that the voice of a film about the Gaza conflict was the child of a Hamas representative, as determined by British broadcasting authority Ofcom.
An probe by the media regulator into the programme Gaza: How to Survive a Warzone has concluded that the programme was "materially misleading".
The chief executive of the broadcaster had earlier expressed regret, stating there had been "a serious error in relation to accuracy".
The authority has instructed the corporation to transmit a prime-time announcement about its decisions.
"As this represents a serious breach of our code, we are directing the broadcaster to transmit a statement of our determinations against it on the BBC's second channel at 9pm, with a schedule to be finalised," the statement read.
'Potential to Undermine Trust'
The regulator's report stated: "Our probe concluded that the film's failure to disclose that the narrator's father held a post in the Hamas-run authority was significantly deceptive.
"Consequently that the audience did not have vital facts which may have been highly relevant to their assessment of the presenter and the information he provided.
"Trust is at the core of the connection between a television network and its public, especially for a state-funded media outlet such as the public broadcaster.
"This error had the potential to erode the very considerable amounts of trust that audiences would have put in a factual film from the broadcaster about the Israel-Gaza war."
The film was withdrawn from iPlayer in February after the narrator's family links were revealed, and in this past July an broadcaster's internal assessment found it breached the broadcaster's journalistic standards on accuracy.
A BBC spokesperson commented: "The authority's determination is in line with the conclusions of the internal assessment, that there was a major oversight in the programme in relation to the corporation's content standards on factual correctness, which reflects Rule 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we agree with Ofcom's decision in full. We will follow the penalty as soon as the date and wording are determined."
