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 Gaza was the child of a Hamas representative, as ruled by UK media regulator Ofcom.
An investigation by the media regulator into the programme Gaza: How to Survive a Warzone has determined that the documentary was "materially misleading".
The chief executive of the broadcaster had already issued an apology, noting there had been "a major oversight in relation to accuracy".
Ofcom has directed the broadcaster to air a peak-time declaration about its findings.
"Since this amounts to a serious breach of our code, we are directing the corporation to broadcast a message of our conclusions against it on the BBC's second channel at 21:00, with a timing to be finalised," the regulator stated.
'Risk to Erode Trust'
The authority's announcement said: "The inquiry we conducted determined that the programme's lack of disclosure that the presenter's father occupied a post in the Hamas-controlled administration was substantially inaccurate.
"This implied that the viewers did not have vital facts which may have been very significant to their judgment of the voice and the information he provided.
"Confidence is at the center of the relationship between a media organization and its audience, particularly for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the potential to damage the exceptionally strong degrees of trust that audiences would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The programme was removed from the online platform in the month of February after the narrator's familial connections emerged, and in July an corporation's own inquiry concluded it infringed the organization's journalistic standards on truthfulness.
A BBC spokesperson commented: "The Ofcom ruling is in agreement with the results of the corporation's inquiry, that there was a significant failing in the programme in relation to the BBC's Editorial Guidelines on truthfulness, which reflects Rule 2.2 of the regulator's media standards.
"We issued an apology for this and we comply with the regulator's ruling in full. We will adhere to the penalty as soon as the timing and wording are finalised."
