The public service broadcaster engaged in a "significant breach" of media regulations by failing to disclose that the voice of a programme about the Gaza conflict was the offspring of a Hamas representative, as determined by British broadcasting authority Ofcom.
An inquiry by Ofcom into Gaza: How to Survive a Warzone has found that the documentary was "materially misleading".
The chief executive of the broadcaster had already issued an apology, saying there had been "a significant failing in relation to truthfulness".
The regulator has ordered the BBC to broadcast a prime-time announcement about its decisions.
"Since this amounts to a major infringement of our code, we are ordering the corporation to broadcast a announcement of our findings against it on BBC2 at 9pm, with a date to be confirmed," it said.
'Possibility to Damage Confidence'
The authority's announcement declared: "Our probe concluded that the documentary's failure to disclose that the presenter's father served in a role in the Hamas-controlled government was substantially inaccurate.
"It meant that the audience did not have vital facts which may have been extremely pertinent to their assessment of the narrator and the information he presented.
"Trust is at the center of the relationship between a media organization and its audience, notably for a national broadcasting corporation such as the British Broadcasting Corporation.
"This failing had the risk to damage the exceptionally strong amounts of credibility that audiences would have invested in a factual film from the broadcaster about the Gaza conflict."
The documentary was removed from the BBC's streaming service in February after the boy's family links emerged, and in the month of July an corporation's own inquiry determined it violated the organization's journalistic standards on factual correctness.
A corporation official commented: "The regulator's decision is in accordance with the findings of the corporation's inquiry, that there was a significant failing in the programme in relation to the BBC's Editorial Guidelines on factual correctness, which reflects regulation 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we comply with the regulator's ruling in complete. We will adhere to the directive as soon as the date and language are finalised."
