The British broadcaster committed a "significant breach" of media regulations by not revealing that the narrator of a film about the Gaza situation was the son of a Hamas administrator, as determined by regulatory body Ofcom.
An investigation by Ofcom into the programme Gaza: How to Survive a Warzone has concluded that the documentary was "substantially inaccurate".
The chief executive of the broadcaster had earlier expressed regret, stating there had been "a serious error in relation to truthfulness".
The regulator has instructed the corporation to transmit a evening declaration about its conclusions.
"Given this constitutes a serious breach of our rules, we are ordering the BBC to transmit a announcement of our findings against it on BBC2 at nine o'clock in the evening, with a timing to be finalised," the statement read.
'Potential to Undermine Trust'
The authority's announcement stated: "Our investigation determined that the documentary's lack of disclosure that the narrator's male guardian held a role in the Hamas-controlled authority was significantly deceptive.
"It meant that the audience did not have vital facts which may have been highly relevant to their judgment of the voice and the content he presented.
"Credibility is at the center of the bond between a media organization and its public, notably for a public service broadcaster such as the British Broadcasting Corporation.
"This failing had the risk to undermine the significantly high levels of trust that the public would have invested in a factual film from the broadcaster about the Gaza conflict."
The film was pulled from the BBC's streaming service in last February after the narrator's familial connections emerged, and in July an internal BBC review determined it breached the organization's editorial guidelines on truthfulness.
A representative for the broadcaster commented: "The authority's determination is in agreement with the conclusions of Peter Johnston's review, that there was a major oversight in the film in relation to the broadcaster's journalistic policies on truthfulness, which reflects regulation 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we comply with Ofcom's decision in complete. We will adhere to the penalty as soon as the schedule and language are confirmed."
