The British broadcaster was found to have committed a "serious breach" of broadcasting rules by failing to disclose that the voice of a documentary about Gaza was the offspring of a Hamas representative, as ruled by regulatory body Ofcom.
An inquiry by the broadcasting watchdog into Gaza: How to Survive a Warzone has concluded that the documentary was "materially misleading".
The chief executive of the broadcaster had already issued an apology, saying there had been "a serious error in relation to accuracy".
The authority has instructed the BBC to air a evening announcement about its decisions.
"Since this amounts to a significant violation of our regulations, we are directing the corporation to transmit a announcement of our findings against it on BBC2 at 21:00, with a schedule to be finalised," it said.
'Possibility to Undermine Confidence'
The watchdog's announcement said: "The inquiry we conducted found that the documentary's omission to reveal that the presenter's male guardian occupied a post in the Hamas-administered administration was substantially inaccurate.
"Consequently that the public did not have vital facts which may have been very significant to their evaluation of the narrator and the details he presented.
"Confidence is at the heart of the relationship between a television network and its public, notably for a national broadcasting corporation such as the BBC.
"This error had the possibility to undermine the exceptionally strong amounts of credibility that viewers would have put in a documentary produced by the BBC about the Israel-Gaza war."
The documentary was pulled from iPlayer in last February after the boy's family links came to light, and in this past July an broadcaster's internal assessment found it infringed the broadcaster's editorial guidelines on truthfulness.
A corporation official said: "The Ofcom ruling is in accordance with the conclusions of the corporation's inquiry, that there was a major oversight in the programme in relation to the BBC's Editorial Guidelines on truthfulness, which corresponds to Rule 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we accept the authority's determination in complete. We will adhere to the directive as soon as the schedule and wording are determined."
