The British broadcaster engaged in a "major breach" of broadcasting rules by not revealing that the presenter of a film about the Gaza situation was the offspring of a Hamas representative, according to UK media regulator Ofcom.
An inquiry by Ofcom into the programme Gaza: How to Survive a Warzone has determined that the programme was "significantly deceptive".
The BBC's director general had previously apologised, stating there had been "a serious error in relation to factual correctness".
The regulator has ordered the BBC to transmit a peak-time statement about its conclusions.
"Given this constitutes a significant violation of our regulations, we are instructing the corporation to transmit a statement of our determinations against it on the BBC's second channel at 21:00, with a timing to be confirmed," the regulator stated.
'Risk to Erode Confidence'
The regulator's statement stated: "Our probe concluded that the programme's lack of disclosure that the presenter's parent occupied a post in the Hamas-controlled government was materially misleading.
"It meant that the public did not have essential details which may have been very significant to their judgment of the presenter and the details he provided.
"Trust is at the center of the relationship between a media organization and its public, notably for a public service broadcaster such as the British Broadcasting Corporation.
"This failing had the risk to damage the significantly high amounts of trust that the public would have put in a documentary produced by the BBC about the conflict in Gaza."
The programme was withdrawn from the online platform in the month of February after the presenter's family links were revealed, and in the month of July an broadcaster's internal assessment found it breached the corporation's editorial guidelines on truthfulness.
A representative for the broadcaster said: "The authority's determination is in accordance with the findings of Peter Johnston's review, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on factual correctness, which corresponds to clause 2.2 of the regulator's media standards.
"We expressed regret for this and we agree with the authority's determination in full. We will comply with the directive as soon as the date and wording are finalised."
