The BBC engaged in a "significant breach" of media regulations by not revealing that the voice of a film about the Gaza situation was the child of a Hamas representative, according to UK media regulator Ofcom.
An investigation by Ofcom into Gaza: How to Survive a Warzone has determined that the film was "materially misleading".
The BBC's director general had previously apologised, saying there had been "a serious error in relation to accuracy".
The regulator has instructed the BBC to air a prime-time announcement about its conclusions.
"As this represents a major infringement of our regulations, we are directing the corporation to air a message of our findings against it on BBC2 at 21:00, with a schedule to be confirmed," the regulator stated.
'Possibility to Undermine Trust'
The watchdog's statement stated: "Our investigation found that the programme's lack of disclosure that the presenter's parent occupied a post in the Hamas-administered government was materially misleading.
"It meant that the audience did not have vital facts which may have been very significant to their evaluation of the narrator and the information he provided.
"Credibility is at the core of the relationship between a broadcaster and its viewers, especially for a national broadcasting corporation such as the BBC.
"This error had the potential to undermine the significantly high levels of credibility that the public would have put in a BBC factual programme about the Israel-Gaza war."
The programme was pulled from the online platform in last February after the boy's familial connections were revealed, and in this past July an corporation's own inquiry found it violated the organization's content policies on truthfulness.
A corporation official commented: "The Ofcom ruling is in line with the findings of the corporation's inquiry, that there was a serious error in the programme in relation to the corporation's content standards on factual correctness, which reflects Rule 2.2 of the regulator's media standards.
"We have apologised for this and we accept the regulator's ruling in its entirety. We will follow the penalty as soon as the timing and wording are determined."
