The British broadcaster was found to have committed a "major breach" of industry standards by omitting to mention that the presenter of a documentary about Gaza was the offspring of a Hamas administrator, as determined by UK media regulator Ofcom.
An inquiry by the broadcasting watchdog into Gaza: How to Survive a Warzone has concluded that the programme was "substantially inaccurate".
The BBC's director general had already issued an apology, noting there had been "a serious error in relation to accuracy".
The regulator has ordered the BBC to transmit a evening announcement about its conclusions.
"Given this constitutes a significant violation of our code, we are directing the broadcaster to transmit a announcement of our determinations against it on BBC Two at nine o'clock in the evening, with a schedule to be determined," the regulator stated.
'Possibility to Erode Trust'
The watchdog's announcement declared: "Our probe determined that the film's lack of disclosure that the presenter's father held a position in the Hamas-controlled government was materially misleading.
"Consequently that the public did not have critical information which may have been very significant to their assessment of the presenter and the information he shared.
"Trust is at the heart of the bond between a television network and its audience, notably for a public service broadcaster such as the public broadcaster.
"This error had the risk to erode the very considerable amounts of trust that the public would have invested in a factual film from the broadcaster about the Israel-Gaza war."
The documentary was pulled from the online platform in the month of February after the presenter's familial connections came to light, and in July an corporation's own inquiry determined it breached the organization's journalistic standards on factual correctness.
A representative for the broadcaster commented: "The Ofcom ruling is in line with the conclusions of Peter Johnston's review, that there was a serious error in the documentary in relation to the broadcaster's journalistic policies on factual correctness, which aligns with Rule 2.2 of the regulator's media standards.
"We expressed regret for this and we comply with the regulator's ruling in complete. We will follow the penalty as soon as the timing and language are determined."
