The BBC committed a "major breach" of industry standards by failing to disclose that the narrator of a documentary about the Gaza situation was the child of a Hamas representative, as ruled by regulatory body Ofcom.
An inquiry by the media regulator into the documentary titled Gaza: How to Survive a Warzone has determined that the documentary was "significantly deceptive".
The chief executive of the broadcaster had previously apologised, noting there had been "a major oversight in relation to accuracy".
The authority has instructed the BBC to broadcast a prime-time statement about its findings.
"Since this amounts to a serious breach of our rules, we are directing the broadcaster to air a message of our determinations against it on the BBC's second channel at nine o'clock in the evening, with a timing to be determined," the regulator stated.
'Potential to Undermine Credibility'
The regulator's announcement declared: "Our investigation found that the programme's lack of disclosure that the presenter's father occupied a role in the Hamas-run government was materially misleading.
"Consequently that the audience did not have critical information which may have been very significant to their assessment of the voice and the details he presented.
"Credibility is at the center of the bond between a media organization and its public, particularly for a state-funded media outlet such as the BBC.
"This oversight had the potential to erode the significantly high degrees of credibility that audiences would have put in a factual film from the broadcaster about the conflict in Gaza."
The programme was removed from iPlayer in the month of February after the presenter's family links were revealed, and in this past July an broadcaster's internal assessment found it violated the corporation's editorial guidelines on accuracy.
A representative for the broadcaster commented: "The regulator's decision is in agreement with the findings of the internal assessment, that there was a major oversight in the film in relation to the BBC's Editorial Guidelines on truthfulness, which aligns with Rule 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we agree with Ofcom's decision in complete. We will follow the penalty as soon as the date and language are determined."
