The public service broadcaster engaged in a "serious breach" of media regulations by failing to disclose that the presenter of a film about the Gaza situation was the child of a Hamas official, as ruled by regulatory body Ofcom.
An probe by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has determined that the programme was "substantially inaccurate".
The head of the BBC had previously apologised, noting there had been "a significant failing in relation to accuracy".
The regulator has directed the corporation to air a evening announcement about its decisions.
"Given this constitutes a major infringement of our regulations, we are ordering the corporation to air a message of our determinations against it on the BBC's second channel at nine o'clock in the evening, with a schedule to be confirmed," the regulator stated.
'Risk to Erode Trust'
The watchdog's announcement said: "Our investigation determined that the film's failure to disclose that the narrator's parent served in a position in the Hamas-controlled administration was materially misleading.
"This implied that the public did not have vital facts which may have been highly relevant to their assessment of the presenter and the content he presented.
"Credibility is at the core of the relationship between a broadcaster and its audience, particularly for a national broadcasting corporation such as the public broadcaster.
"This failing had the potential to erode the significantly high amounts of confidence that audiences would have placed in a documentary produced by the BBC about the Gaza conflict."
The programme was withdrawn from the BBC's streaming service in February after the narrator's personal associations emerged, and in July an broadcaster's internal assessment found it breached the organization's content policies on accuracy.
A representative for the broadcaster said: "The authority's determination is in agreement with the results of the internal assessment, that there was a serious error in the documentary in relation to the corporation's content standards on factual correctness, which aligns with Rule 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we accept the regulator's ruling in complete. We will comply with the penalty as soon as the date and wording are determined."
