The public service broadcaster engaged in a "major breach" of media regulations by omitting to mention that the voice of a documentary about the Gaza situation was the son of a Hamas official, according to UK media regulator Ofcom.
An inquiry by the media regulator into Gaza: How to Survive a Warzone has determined that the programme was "substantially inaccurate".
The chief executive of the broadcaster had previously apologised, saying there had been "a significant failing in relation to accuracy".
The regulator has ordered the broadcaster to air a prime-time declaration about its decisions.
"As this represents a serious breach of our code, we are instructing the BBC to transmit a announcement of our determinations against it on BBC Two at nine o'clock in the evening, with a date to be confirmed," the statement read.
'Potential to Damage Confidence'
The regulator's statement said: "Our investigation determined that the documentary's omission to reveal that the voice's father held a position in the Hamas-administered administration was materially misleading.
"It meant that the public did not have vital facts which may have been very significant to their evaluation of the voice and the content he provided.
"Credibility is at the core of the relationship between a media organization and its public, notably for a national broadcasting corporation such as the British Broadcasting Corporation.
"This failing had the potential to erode the very considerable degrees of credibility that audiences would have placed in a documentary produced by the BBC about the conflict in Gaza."
The programme was pulled from the online platform in February after the presenter's familial connections were revealed, and in the month of July an corporation's own inquiry determined it violated the corporation's editorial guidelines on factual correctness.
A BBC spokesperson stated: "The Ofcom ruling is in agreement with the conclusions of the corporation's inquiry, that there was a significant failing in the documentary in relation to the corporation's content standards on accuracy, which aligns with Rule 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we comply with Ofcom's decision in its entirety. We will follow the penalty as soon as the date and language are confirmed."
