The British broadcaster was found to have committed a "major breach" of broadcasting rules by failing to disclose that the presenter of a documentary about Gaza was the son of a Hamas official, as ruled by UK media regulator Ofcom.
An probe by Ofcom into Gaza: How to Survive a Warzone has concluded that the programme was "materially misleading".
The chief executive of the broadcaster had already issued an apology, saying there had been "a major oversight in relation to accuracy".
The regulator has directed the corporation to air a prime-time declaration about its conclusions.
"Given this constitutes a major infringement of our code, we are ordering the corporation to broadcast a message of our conclusions against it on BBC2 at nine o'clock in the evening, with a date to be finalised," the regulator stated.
'Risk to Damage Credibility'
The authority's statement declared: "Our investigation determined that the film's omission to reveal that the narrator's father held a position in the Hamas-run government was materially misleading.
"This implied that the audience did not have critical information which may have been extremely pertinent to their judgment of the voice and the information he presented.
"Trust is at the center of the relationship between a media organization and its viewers, particularly for a public service broadcaster such as the BBC.
"This oversight had the potential to damage the very considerable levels of confidence that viewers would have invested in a factual film from the broadcaster about the conflict in Gaza."
The film was removed from the online platform in last February after the presenter's familial connections came to light, and in July an internal BBC review found it violated the organization's content policies on truthfulness.
A BBC spokesperson stated: "The Ofcom ruling is in agreement with the conclusions of the internal assessment, that there was a major oversight in the documentary in relation to the corporation's content standards on truthfulness, which aligns with clause 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we accept the authority's determination in complete. We will adhere to the sanction as soon as the date and language are confirmed."
