The public service broadcaster committed a "significant breach" of broadcasting rules by failing to disclose that the voice of a programme about the Gaza situation was the offspring of a Hamas representative, as determined by British broadcasting authority Ofcom.
An investigation by the media regulator into the documentary titled Gaza: How to Survive a Warzone has determined that the film was "materially misleading".
The head of the BBC had already issued an apology, noting there had been "a major oversight in relation to factual correctness".
The regulator has instructed the BBC to broadcast a evening statement about its findings.
"As this represents a major infringement of our rules, we are instructing the corporation to transmit a announcement of our findings against it on the BBC's second channel at 21:00, with a date to be confirmed," it said.
'Potential to Undermine Confidence'
The watchdog's report said: "Our investigation concluded that the film's omission to reveal that the voice's father occupied a role in the Hamas-controlled authority was materially misleading.
"Consequently that the public did not have vital facts which may have been extremely pertinent to their evaluation of the narrator and the content he shared.
"Trust is at the core of the relationship between a broadcaster and its public, notably for a state-funded media outlet such as the public broadcaster.
"This error had the potential to undermine the significantly high amounts of credibility that audiences would have put in a documentary produced by the BBC about the Gaza conflict."
The film was withdrawn from the online platform in February after the boy's familial connections came to light, and in the month of July an broadcaster's internal assessment found it breached the broadcaster's content policies on truthfulness.
A corporation official commented: "The authority's determination is in agreement with the findings of the corporation's inquiry, that there was a major oversight in the film in relation to the BBC's Editorial Guidelines on truthfulness, which reflects regulation 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we agree with Ofcom's decision in complete. We will comply with the penalty as soon as the timing and language are confirmed."
