The British broadcaster committed a "serious breach" of media regulations by not revealing that the voice of a film about the Gaza conflict was the offspring of a Hamas official, as ruled by UK media regulator Ofcom.
An probe by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the film was "substantially inaccurate".
The head of the BBC had earlier expressed regret, stating there had been "a significant failing in relation to accuracy".
Ofcom has instructed the broadcaster to transmit a evening announcement about its conclusions.
"Given this constitutes a significant violation of our code, we are ordering the BBC to transmit a announcement of our conclusions against it on BBC2 at 9pm, with a timing to be finalised," it said.
'Potential to Damage Trust'
The watchdog's statement stated: "Our probe concluded that the film's omission to reveal that the presenter's male guardian held a role in the Hamas-run authority was materially misleading.
"Consequently that the public did not have critical information which may have been very significant to their assessment of the narrator and the information he presented.
"Trust is at the center of the bond between a media organization and its audience, especially for a national broadcasting corporation such as the public broadcaster.
"This failing had the potential to erode the exceptionally strong amounts of confidence that the public would have invested in a BBC factual programme about the conflict in Gaza."
The programme was withdrawn from iPlayer in the month of February after the narrator's familial connections were revealed, and in the month of July an corporation's own inquiry found it violated the organization's editorial guidelines on truthfulness.
A corporation official commented: "The Ofcom ruling is in line with the results of the corporation's inquiry, that there was a serious error in the film in relation to the corporation's content standards on truthfulness, which aligns with Rule 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we agree with the authority's determination in full. We will follow the penalty as soon as the schedule and wording are confirmed."
