The public service broadcaster was found to have committed a "major breach" of media regulations by not revealing that the narrator of a documentary about Gaza was the son of a Hamas official, as determined by British broadcasting authority Ofcom.
An investigation by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has determined that the programme was "materially misleading".
The BBC's director general had already issued an apology, noting there had been "a significant failing in relation to accuracy".
The authority has ordered the corporation to air a peak-time declaration about its findings.
"As this represents a major infringement of our regulations, we are ordering the broadcaster to transmit a message of our determinations against it on BBC Two at 9pm, with a schedule to be determined," it said.
'Risk to Undermine Confidence'
The watchdog's report declared: "The inquiry we conducted found that the programme's lack of disclosure that the presenter's father occupied a post in the Hamas-controlled government was significantly deceptive.
"This implied that the public did not have vital facts which may have been extremely pertinent to their judgment of the narrator and the details he provided.
"Confidence is at the core of the bond between a television network and its viewers, notably for a public service broadcaster such as the public broadcaster.
"This failing had the potential to damage the exceptionally strong levels of trust that viewers would have placed in a documentary produced by the BBC about the Gaza conflict."
The programme was pulled from the BBC's streaming service in last February after the presenter's personal associations were revealed, and in this past July an corporation's own inquiry determined it infringed the corporation's journalistic standards on factual correctness.
A representative for the broadcaster said: "The regulator's decision is in line with the findings of the internal assessment, that there was a significant failing in the programme in relation to the BBC's Editorial Guidelines on accuracy, which aligns with Rule 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we accept the authority's determination in its entirety. We will adhere to the directive as soon as the schedule and language are confirmed."
