The British broadcaster was found to have committed a "major breach" of broadcasting rules by not revealing that the narrator of a film about the Gaza situation was the child of a Hamas administrator, as determined by British broadcasting authority Ofcom.
An investigation by Ofcom into Gaza: How to Survive a Warzone has concluded that the documentary was "significantly deceptive".
The chief executive of the broadcaster had previously apologised, saying there had been "a serious error in relation to accuracy".
Ofcom has directed the broadcaster to broadcast a evening announcement about its conclusions.
"Since this amounts to a serious breach of our code, we are directing the BBC to air a statement of our determinations against it on the BBC's second channel at nine o'clock in the evening, with a timing to be confirmed," the statement read.
'Risk to Damage Credibility'
The authority's report said: "Our investigation determined that the film's omission to reveal that the presenter's male guardian served in a role in the Hamas-controlled government was materially misleading.
"Consequently that the public did not have essential details which may have been highly relevant to their judgment of the narrator and the details he presented.
"Trust is at the center of the relationship between a television network and its audience, notably for a public service broadcaster such as the public broadcaster.
"This failing had the possibility to undermine the exceptionally strong levels of confidence that audiences would have invested in a factual film from the broadcaster about the Gaza conflict."
The documentary was removed from iPlayer in last February after the narrator's personal associations were revealed, and in the month of July an corporation's own inquiry concluded it breached the corporation's journalistic standards on truthfulness.
A BBC spokesperson commented: "The regulator's decision 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 truthfulness, which reflects clause 2.2 of the regulator's media standards.
"We issued an apology for this and we accept the authority's determination in complete. We will follow the penalty as soon as the schedule and wording are finalised."
