The public service broadcaster committed a "significant breach" of industry standards by omitting to mention that the presenter of a film about the Gaza conflict was the son of a Hamas official, according to British broadcasting authority Ofcom.
An investigation by the media regulator into Gaza: How to Survive a Warzone has concluded that the film was "substantially inaccurate".
The BBC's director general had already issued an apology, saying there had been "a major oversight in relation to factual correctness".
The authority has directed the BBC to broadcast a prime-time statement about its decisions.
"Since this amounts to a serious breach of our code, we are directing the BBC to broadcast a announcement of our findings against it on BBC2 at 9pm, with a date to be determined," the regulator stated.
'Potential to Damage Confidence'
The authority's report said: "Our investigation concluded that the documentary's failure to disclose that the presenter's male guardian held a role in the Hamas-administered administration was materially misleading.
"Consequently that the public did not have critical information which may have been highly relevant to their assessment of the narrator and the details he shared.
"Trust is at the core of the connection between a broadcaster and its public, notably for a public service broadcaster such as the BBC.
"This failing had the potential to erode the exceptionally strong amounts of trust that audiences would have invested in a factual film from the broadcaster about the conflict in Gaza."
The film was pulled from iPlayer in the month of February after the boy's familial connections emerged, and in July an internal BBC review concluded it breached the organization's editorial guidelines on accuracy.
A corporation official stated: "The authority's determination is in line with the conclusions of Peter Johnston's review, that there was a major oversight in the programme in relation to the corporation's content standards on truthfulness, which aligns with clause 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept the authority's determination in full. We will comply with the penalty as soon as the date and wording are finalised."
