The British broadcaster was found to have committed a "serious breach" of industry standards by not revealing that the narrator of a programme about the Gaza situation was the child of a Hamas administrator, as determined by British broadcasting authority Ofcom.
An probe by the media regulator into Gaza: How to Survive a Warzone has concluded that the programme was "substantially inaccurate".
The BBC's director general had earlier expressed regret, noting there had been "a serious error in relation to accuracy".
Ofcom has instructed the broadcaster to broadcast a evening announcement about its decisions.
"Since this amounts to a significant violation of our code, we are instructing the BBC to air a statement of our findings against it on the BBC's second channel at nine o'clock in the evening, with a date to be determined," the regulator stated.
'Risk to Erode Confidence'
The watchdog's announcement declared: "Our probe determined that the programme's failure to disclose that the narrator's father held a role in the Hamas-controlled administration was significantly deceptive.
"It meant that the audience did not have critical information which may have been highly relevant to their evaluation of the voice and the information he provided.
"Confidence is at the core of the connection between a broadcaster and its public, especially for a public service broadcaster such as the BBC.
"This failing had the potential to undermine the significantly high levels of credibility that audiences would have placed in a BBC factual programme about the conflict in Gaza."
The programme was pulled from the BBC's streaming service in February after the narrator'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 corporation official stated: "The authority's determination is in accordance with the findings of the corporation's inquiry, that there was a significant failing in the programme in relation to the BBC's Editorial Guidelines on factual correctness, which corresponds to regulation 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we agree with the regulator's ruling in full. We will comply with the sanction as soon as the date and language are finalised."
