The public service broadcaster committed a "major breach" of industry standards by not revealing that the presenter of a documentary about the Gaza situation was the child of a Hamas representative, according to UK media regulator Ofcom.
An inquiry by Ofcom into Gaza: How to Survive a Warzone has found that the film was "substantially inaccurate".
The chief executive of the broadcaster had already issued an apology, stating there had been "a major oversight in relation to accuracy".
The authority has ordered the broadcaster to broadcast a peak-time statement about its findings.
"Given this constitutes a significant violation of our rules, we are directing the broadcaster to transmit a announcement of our conclusions against it on the BBC's second channel at 21:00, with a schedule to be determined," it said.
'Risk to Undermine Credibility'
The watchdog's announcement said: "The inquiry we conducted determined that the documentary's failure to disclose that the presenter's parent served in a position in the Hamas-controlled administration was materially misleading.
"This implied that the public did not have critical information which may have been extremely pertinent to their assessment of the voice and the details he shared.
"Trust is at the heart of the bond between a television network and its public, particularly for a state-funded media outlet such as the British Broadcasting Corporation.
"This oversight had the possibility to damage the significantly high degrees of confidence that the public would have put in a documentary produced by the BBC about the conflict in Gaza."
The programme was pulled from iPlayer in February after the presenter's familial connections emerged, and in July an corporation's own inquiry determined it infringed the corporation's journalistic standards on accuracy.
A BBC spokesperson commented: "The regulator's decision is in accordance with the results of the corporation's inquiry, that there was a serious error in the documentary in relation to the broadcaster's journalistic policies on accuracy, which aligns with clause 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we accept the regulator's ruling in full. We will follow the sanction as soon as the date and wording are confirmed."
