The British broadcaster committed a "significant breach" of industry standards by not revealing that the voice of a documentary about the Gaza conflict was the child of a Hamas administrator, as ruled by UK media regulator Ofcom.
An investigation by the broadcasting watchdog into Gaza: How to Survive a Warzone has found that the documentary was "substantially inaccurate".
The chief executive of the broadcaster had previously apologised, stating there had been "a major oversight in relation to accuracy".
The regulator has ordered the BBC to air a prime-time declaration about its decisions.
"Since this amounts to a major infringement of our code, we are directing the BBC to transmit a announcement of our determinations against it on the BBC's second channel at 9pm, with a timing to be confirmed," it said.
'Potential to Damage Trust'
The watchdog's statement said: "Our investigation concluded that the programme's lack of disclosure that the voice's father occupied a role in the Hamas-controlled government was materially misleading.
"This implied that the audience did not have essential details which may have been extremely pertinent to their judgment of the presenter and the content he presented.
"Confidence is at the core of the bond between a television network and its viewers, notably for a public service broadcaster such as the BBC.
"This error had the possibility to damage the exceptionally strong levels of credibility that audiences would have put in a documentary produced by the BBC about the conflict in Gaza."
The film was pulled from iPlayer in the month of February after the presenter's familial connections were revealed, and in July an internal BBC review concluded it infringed the corporation's journalistic standards on truthfulness.
A representative for the broadcaster commented: "The regulator's decision is in accordance with the findings of the corporation's inquiry, that there was a significant failing in the film in relation to the BBC's Editorial Guidelines on factual correctness, which aligns with regulation 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we accept Ofcom's decision in complete. We will comply with the sanction as soon as the schedule and wording are finalised."
