The BBC committed a "major breach" of media regulations by omitting to mention that the presenter of a programme about the Gaza situation was the offspring of a Hamas representative, as ruled by British broadcasting authority Ofcom.
An investigation by the media regulator into Gaza: How to Survive a Warzone has concluded that the documentary was "materially misleading".
The BBC's director general had previously apologised, noting there had been "a major oversight in relation to accuracy".
The regulator has ordered the corporation to air a peak-time announcement about its conclusions.
"Since this amounts to a significant violation of our code, we are ordering the broadcaster to broadcast a statement of our findings against it on BBC2 at 9pm, with a date to be finalised," the statement read.
'Risk to Damage Confidence'
The watchdog's announcement declared: "Our investigation determined that the programme's failure to disclose that the narrator's parent held a post in the Hamas-administered authority was substantially inaccurate.
"This implied that the audience did not have vital facts which may have been very significant to their judgment of the voice and the information he provided.
"Confidence is at the core of the relationship between a broadcaster and its viewers, notably for a state-funded media outlet such as the public broadcaster.
"This oversight had the possibility to undermine the exceptionally strong amounts of confidence that audiences would have put in a factual film from the broadcaster about the Gaza conflict."
The programme was removed from the online platform in the month of February after the boy's familial connections came to light, and in the month of July an broadcaster's internal assessment concluded it infringed the organization's journalistic standards on truthfulness.
A BBC spokesperson said: "The authority's determination is in accordance with the conclusions of the corporation's inquiry, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on factual correctness, which corresponds to regulation 2.2 of the regulator's media standards.
"We expressed regret for this and we accept the authority's determination in complete. We will adhere to the directive as soon as the date and language are determined."
