The BBC was found to have committed a "serious breach" of industry standards by not revealing that the presenter of a documentary about the Gaza conflict was the son of a Hamas administrator, as ruled by British broadcasting authority Ofcom.
An inquiry by the media regulator into Gaza: How to Survive a Warzone has concluded that the documentary was "significantly deceptive".
The BBC's director general had previously apologised, noting there had been "a major oversight in relation to accuracy".
Ofcom has directed the corporation to broadcast a evening statement about its conclusions.
"As this represents a significant violation of our regulations, we are directing the corporation to broadcast a message of our conclusions against it on the BBC's second channel at 9pm, with a date to be finalised," it said.
'Potential to Undermine Confidence'
The regulator's statement stated: "The inquiry we conducted found that the film's omission to reveal that the narrator's father held a role in the Hamas-run government was significantly deceptive.
"Consequently that the viewers did not have critical information which may have been extremely pertinent to their assessment of the voice and the information he shared.
"Trust is at the heart of the bond between a broadcaster and its viewers, particularly for a national broadcasting corporation such as the BBC.
"This error had the risk to undermine the exceptionally strong amounts of confidence that the public would have placed in a factual film from the broadcaster about the Gaza conflict."
The programme was removed from iPlayer in the month of February after the presenter's family links emerged, and in this past July an internal BBC review found it violated the corporation's journalistic standards on accuracy.
A representative for the broadcaster stated: "The authority's determination is in accordance with the results of the corporation's inquiry, that there was a major oversight in the documentary in relation to the BBC's Editorial Guidelines on accuracy, which corresponds to regulation 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we accept Ofcom's decision in its entirety. We will comply with the directive as soon as the timing and wording are finalised."
