The British broadcaster was found to have committed a "major breach" of industry standards by failing to disclose that the narrator of a documentary about the Gaza conflict was the offspring of a Hamas administrator, according to UK media regulator Ofcom.
An inquiry by Ofcom into Gaza: How to Survive a Warzone has found that the film was "materially misleading".
The BBC's director general had already issued an apology, noting there had been "a major oversight in relation to factual correctness".
Ofcom has instructed the corporation to transmit a evening declaration about its conclusions.
"Given this constitutes a serious breach of our regulations, we are directing the BBC to air a statement of our determinations against it on BBC2 at 9pm, with a date to be determined," it said.
'Possibility to Damage Trust'
The watchdog's statement said: "The inquiry we conducted determined that the documentary's lack of disclosure that the presenter's parent occupied a post in the Hamas-administered authority was substantially inaccurate.
"Consequently that the viewers did not have critical information which may have been extremely pertinent to their assessment of the presenter and the content he presented.
"Confidence is at the heart of the connection between a television network and its viewers, especially for a national broadcasting corporation such as the public broadcaster.
"This failing had the potential to damage the significantly high levels of confidence that audiences would have invested in a BBC factual programme about the conflict in Gaza."
The programme was removed from the online platform in February after the narrator's personal associations emerged, and in July an internal BBC review determined it breached the organization's journalistic standards on accuracy.
A representative for the broadcaster stated: "The regulator's decision is in accordance with the conclusions of the internal assessment, that there was a major oversight in the programme in relation to the BBC's Editorial Guidelines on truthfulness, which reflects clause 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we agree with Ofcom's decision in complete. We will follow the directive as soon as the schedule and language are confirmed."
