The British broadcaster committed a "major breach" of industry standards by failing to disclose that the narrator of a documentary about the Gaza situation was the child of a Hamas official, as determined by UK media regulator Ofcom.
An inquiry by Ofcom into the programme Gaza: How to Survive a Warzone has found that the programme was "significantly deceptive".
The chief executive of the broadcaster had earlier expressed regret, noting there had been "a serious error in relation to factual correctness".
Ofcom has directed the corporation to broadcast a prime-time declaration about its findings.
"Given this constitutes a major infringement of our regulations, we are ordering the BBC to broadcast a announcement of our findings against it on the BBC's second channel at nine o'clock in the evening, with a timing to be finalised," the statement read.
'Risk to Erode Confidence'
The regulator's announcement declared: "The inquiry we conducted determined that the film's omission to reveal that the narrator's parent occupied a position in the Hamas-controlled administration was significantly deceptive.
"Consequently that the public did not have critical information which may have been highly relevant to their evaluation of the voice and the information he provided.
"Trust is at the core of the bond between a television network and its viewers, particularly for a public service broadcaster such as the BBC.
"This failing had the possibility to damage the exceptionally strong amounts of credibility that the public would have put in a documentary produced by the BBC about the Israel-Gaza war."
The documentary was removed from the online platform in February after the boy's family links were revealed, and in the month of July an corporation's own inquiry found it violated the organization's journalistic standards on truthfulness.
A corporation official said: "The Ofcom ruling is in accordance with the results of Peter Johnston's review, that there was a significant failing in the documentary in relation to the broadcaster's journalistic policies on accuracy, which aligns with clause 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we comply with Ofcom's decision in complete. We will follow the penalty as soon as the schedule and wording are finalised."
