The British broadcaster was found to have committed a "serious breach" of industry standards by not revealing that the narrator of a documentary about Gaza was the offspring of a Hamas representative, according to regulatory body Ofcom.
An inquiry by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has found that the film was "significantly deceptive".
The BBC's director general had already issued an apology, noting there had been "a major oversight in relation to factual correctness".
The authority has directed the corporation to broadcast a prime-time announcement about its findings.
"As this represents a significant violation of our rules, we are instructing the BBC to broadcast a statement of our determinations against it on BBC2 at 9pm, with a schedule to be finalised," the statement read.
'Risk to Undermine Credibility'
The watchdog's statement declared: "Our investigation determined that the film's failure to disclose that the presenter's parent occupied a role in the Hamas-run authority was significantly deceptive.
"This implied that the audience did not have critical information which may have been extremely pertinent to their judgment of the narrator and the details he provided.
"Trust is at the core of the connection between a broadcaster and its viewers, notably for a public service broadcaster such as the British Broadcasting Corporation.
"This failing had the possibility to erode the exceptionally strong levels of confidence that audiences would have put in a documentary produced by the BBC about the Gaza conflict."
The film was removed from iPlayer in last February after the boy's family links were revealed, and in the month of July an internal BBC review found it violated the corporation's content policies on accuracy.
A corporation official stated: "The regulator's decision is in agreement with the conclusions of the corporation's inquiry, that there was a serious error in the film in relation to the BBC's Editorial Guidelines on truthfulness, which reflects 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 penalty as soon as the date and wording are confirmed."