The British broadcaster committed a "significant breach" of media regulations by omitting to mention that the voice of a documentary about the Gaza situation was the child of a Hamas official, as ruled by regulatory body Ofcom.
An inquiry by Ofcom into Gaza: How to Survive a Warzone has concluded that the film was "materially misleading".
The chief executive of the broadcaster had already issued an apology, noting there had been "a major oversight in relation to truthfulness".
Ofcom has ordered the BBC to broadcast a prime-time statement about its decisions.
"Since this amounts to a significant violation of our rules, we are directing the BBC to transmit a message of our conclusions against it on the BBC's second channel at nine o'clock in the evening, with a schedule to be determined," it said.
'Potential to Erode Credibility'
The authority's statement declared: "Our probe determined that the programme's failure to disclose that the voice's father served in a position in the Hamas-administered government was materially misleading.
"This implied that the viewers did not have critical information which may have been very significant to their evaluation of the voice and the details he provided.
"Trust is at the center of the bond between a media organization and its viewers, notably for a public service broadcaster such as the BBC.
"This failing had the risk to damage the significantly high degrees of credibility that audiences would have placed in a documentary produced by the BBC about the Gaza conflict."
The programme was removed from iPlayer in last February after the narrator's personal associations were revealed, and in this past July an internal BBC review concluded it violated the organization's editorial guidelines on accuracy.
A corporation official stated: "The Ofcom ruling is in accordance with the results of Peter Johnston's review, that there was a major oversight in the film in relation to the broadcaster's journalistic policies on truthfulness, which reflects regulation 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we comply with the authority's determination in full. We will adhere to the sanction as soon as the date and wording are finalised."
