The public service broadcaster engaged in a "major breach" of industry standards by omitting to mention that the voice of a documentary about the Gaza situation was the offspring of a Hamas administrator, as determined by UK media regulator Ofcom.
An probe by Ofcom into the programme Gaza: How to Survive a Warzone has found that the programme was "materially misleading".
The head of the BBC had previously apologised, noting there had been "a serious error in relation to factual correctness".
The regulator has ordered the corporation to broadcast a peak-time announcement about its conclusions.
"Since this amounts to a significant violation of our regulations, we are instructing the BBC to transmit a message of our conclusions against it on the BBC's second channel at 9pm, with a schedule to be confirmed," the statement read.
'Possibility to Erode Credibility'
The authority's report declared: "The inquiry we conducted concluded that the film's omission to reveal that the voice's father served in a position in the Hamas-run authority was materially misleading.
"It meant that the viewers did not have critical information which may have been highly relevant to their judgment of the presenter and the information he presented.
"Trust is at the core of the relationship between a broadcaster and its audience, especially for a public service broadcaster such as the British Broadcasting Corporation.
"This error had the potential to undermine the significantly high levels of trust that audiences would have invested in a BBC factual programme about the Gaza conflict."
The film was withdrawn from iPlayer in the month of February after the narrator's personal associations were revealed, and in the month of July an corporation's own inquiry concluded it infringed the corporation's journalistic standards on truthfulness.
A BBC spokesperson said: "The Ofcom ruling 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 accuracy, which aligns with clause 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we comply with Ofcom's decision in full. We will comply with the directive as soon as the schedule and language are determined."
