The public service broadcaster engaged in a "serious breach" of industry standards by omitting to mention that the narrator of a film about the Gaza conflict was the son of a Hamas administrator, as determined by UK media regulator Ofcom.
An investigation by the media regulator into Gaza: How to Survive a Warzone has found that the film was "materially misleading".
The BBC's director general had earlier expressed regret, saying there had been "a major oversight in relation to accuracy".
The authority has directed the corporation to broadcast a prime-time statement about its conclusions.
"Given this constitutes a significant violation of our rules, we are ordering the broadcaster to air a announcement of our conclusions against it on BBC2 at 9pm, with a schedule to be confirmed," the statement read.
'Potential to Erode Confidence'
The watchdog's announcement declared: "The inquiry we conducted found that the film's lack of disclosure that the narrator's father occupied a role in the Hamas-run government was materially misleading.
"Consequently that the audience did not have vital facts which may have been extremely pertinent to their assessment of the narrator and the information he presented.
"Confidence is at the center of the relationship between a media organization and its audience, notably for a state-funded media outlet such as the public broadcaster.
"This failing had the possibility to damage the very considerable degrees of credibility that audiences would have placed in a factual film from the broadcaster about the conflict in Gaza."
The programme was withdrawn from iPlayer in February after the presenter's familial connections were revealed, and in the month of July an broadcaster's internal assessment determined it breached the corporation's journalistic standards on truthfulness.
A representative for the broadcaster said: "The Ofcom ruling is in accordance with the findings of the corporation's inquiry, that there was a major oversight in the documentary in relation to the BBC's Editorial Guidelines on truthfulness, which aligns with clause 2.2 of the regulator's media standards.
"We expressed regret for this and we comply with Ofcom's decision in complete. We will adhere to the sanction as soon as the timing and wording are finalised."
