The British broadcaster was found to have committed a "serious breach" of broadcasting rules by failing to disclose that the narrator of a documentary about the Gaza situation was the child of a Hamas representative, as ruled by regulatory body Ofcom.
An investigation by the media regulator into the programme Gaza: How to Survive a Warzone has determined that the film was "significantly deceptive".
The head of the BBC had earlier expressed regret, noting there had been "a serious error in relation to accuracy".
The authority has instructed the BBC to broadcast a evening declaration about its decisions.
"Given this constitutes a serious breach of our code, we are instructing the BBC to broadcast a announcement of our conclusions against it on BBC2 at 21:00, with a timing to be determined," the statement read.
'Risk to Undermine Confidence'
The watchdog's announcement stated: "The inquiry we conducted determined that the film's lack of disclosure that the presenter's father occupied a post in the Hamas-controlled administration was significantly deceptive.
"This implied that the public did not have critical information which may have been extremely pertinent to their evaluation of the voice and the details he shared.
"Credibility is at the core of the connection between a media organization and its public, notably for a public service broadcaster such as the public broadcaster.
"This failing had the potential to damage the exceptionally strong amounts of confidence that the public would have invested in a documentary produced by the BBC about the Gaza conflict."
The film was removed from the BBC's streaming service in last February after the boy's personal associations emerged, and in the month of July an corporation's own inquiry found it infringed the corporation's editorial guidelines on accuracy.
A BBC spokesperson said: "The Ofcom ruling is in agreement with the conclusions of the internal assessment, that there was a significant failing in the programme in relation to the BBC's Editorial Guidelines on accuracy, which aligns with clause 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we agree with the authority's determination in complete. We will follow the penalty as soon as the schedule and language are confirmed."
