The British broadcaster was found to have committed a "serious breach" of media regulations by not revealing that the narrator of a programme about the Gaza situation was the offspring of a Hamas representative, as determined by British broadcasting authority Ofcom.
An probe by the media regulator into the programme Gaza: How to Survive a Warzone has found that the film was "materially misleading".
The BBC's director general had earlier expressed regret, noting there had been "a major oversight in relation to truthfulness".
The regulator has directed the BBC to transmit a peak-time declaration about its decisions.
"Given this constitutes a significant violation of our code, we are instructing the BBC to transmit a statement of our findings against it on BBC Two at 21:00, with a timing to be determined," it said.
The regulator's report said: "Our probe found that the documentary's failure to disclose that the presenter's male guardian occupied a post in the Hamas-controlled government was substantially inaccurate.
"This implied that the viewers did not have essential details which may have been extremely pertinent to their assessment of the presenter and the details he presented.
"Confidence is at the heart of the connection between a broadcaster and its audience, notably for a public service broadcaster such as the British Broadcasting Corporation.
"This failing had the potential to erode the exceptionally strong degrees of credibility that the public would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The documentary was withdrawn from the online platform in February after the boy's familial connections emerged, and in this past July an broadcaster's internal assessment found it breached the organization's content policies on truthfulness.
A representative for the broadcaster stated: "The regulator's decision is in line with the conclusions of the corporation's inquiry, that there was a serious error in the documentary in relation to the BBC's Editorial Guidelines on truthfulness, which aligns with Rule 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we comply with Ofcom's decision in full. We will adhere to the directive as soon as the timing and wording are determined."
Elena Vance is a film critic and entertainment journalist with over a decade of experience covering international cinema and industry trends.