The BBC was found to have committed a "significant breach" of media regulations by failing to disclose that the voice of a film about the Gaza conflict was the offspring of a Hamas official, as ruled by British broadcasting authority Ofcom.
An inquiry by Ofcom into the documentary titled Gaza: How to Survive a Warzone has determined that the programme was "substantially inaccurate".
The BBC's director general had previously apologised, saying there had been "a serious error in relation to factual correctness".
Ofcom has ordered the corporation to air a prime-time declaration about its conclusions.
"As this represents a serious breach of our code, we are directing the BBC to transmit a statement of our conclusions against it on the BBC's second channel at 9pm, with a schedule to be finalised," the statement read.
'Potential to Erode Credibility'
The authority's report declared: "The inquiry we conducted found that the film's omission to reveal that the voice's father served in a role in the Hamas-controlled authority was substantially inaccurate.
"This implied that the viewers did not have vital facts which may have been highly relevant to their assessment of the voice and the content he shared.
"Trust is at the center of the relationship between a television network and its audience, particularly for a state-funded media outlet such as the public broadcaster.
"This error had the potential to erode the very considerable amounts of trust that viewers would have invested in a factual film from the broadcaster about the Gaza conflict."
The documentary was withdrawn from the BBC's streaming service in the month of February after the boy's personal associations were revealed, and in the month of July an corporation's own inquiry found it infringed the corporation's journalistic standards on accuracy.
A corporation official said: "The authority's determination is in accordance with the findings of the corporation's inquiry, that there was a significant failing in the film in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to regulation 2.2 of the regulator's media standards.
"We expressed regret for this and we accept the regulator's ruling in complete. We will adhere to the sanction as soon as the schedule and wording are determined."
