The British broadcaster committed a "significant breach" of industry standards by not revealing that the presenter of a documentary about Gaza was the offspring of a Hamas representative, as determined by UK media regulator Ofcom.
An investigation by the media regulator into the programme Gaza: How to Survive a Warzone has found that the documentary was "substantially inaccurate".
The head of the BBC had previously apologised, stating there had been "a major oversight in relation to accuracy".
Ofcom has ordered the corporation to broadcast a prime-time declaration about its conclusions.
"Since this amounts to a major infringement of our rules, we are ordering the broadcaster to transmit a statement of our determinations against it on BBC Two at nine o'clock in the evening, with a timing to be finalised," it said.
'Risk to Erode Confidence'
The authority's statement declared: "The inquiry we conducted determined that the documentary's failure to disclose that the narrator's parent held a role in the Hamas-controlled authority was materially misleading.
"This implied that the audience did not have critical information which may have been very significant to their judgment of the narrator and the content he presented.
"Trust is at the center of the connection between a broadcaster and its audience, particularly for a public service broadcaster such as the BBC.
"This error had the potential to erode the very considerable levels of confidence that viewers would have put in a factual film from the broadcaster about the conflict in Gaza."
The documentary was pulled from iPlayer in last February after the narrator's personal associations came to light, and in the month of July an broadcaster's internal assessment determined it infringed the broadcaster's editorial guidelines on truthfulness.
A representative for the broadcaster commented: "The regulator's decision is in accordance with the findings of Peter Johnston's review, that there was a serious error in the film in relation to the corporation's content standards on truthfulness, which aligns with regulation 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we comply with the authority's determination in complete. We will comply with the sanction as soon as the schedule and language are confirmed."
