The BBC was found to have committed a "major breach" of media regulations by not revealing that the voice of a programme about the Gaza situation was the child of a Hamas representative, as ruled by regulatory body Ofcom.
An investigation by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has determined that the programme was "significantly deceptive".
The chief executive of the broadcaster had earlier expressed regret, saying there had been "a significant failing in relation to truthfulness".
The authority has directed the BBC to broadcast a evening declaration about its conclusions.
"Since this amounts to a significant violation of our rules, we are ordering the corporation to transmit a message of our conclusions against it on the BBC's second channel at nine o'clock in the evening, with a date to be finalised," the statement read.
'Possibility to Undermine Credibility'
The regulator's statement stated: "Our probe found that the documentary's lack of disclosure that the voice's parent served in a post in the Hamas-run administration was materially misleading.
"Consequently that the audience did not have vital facts which may have been highly relevant to their judgment of the narrator and the details he shared.
"Confidence is at the center of the relationship between a television network and its viewers, particularly for a national broadcasting corporation such as the British Broadcasting Corporation.
"This error had the potential to undermine the significantly high amounts of confidence that audiences would have put in a BBC factual programme about the conflict in Gaza."
The documentary was removed from the online platform in the month of February after the boy's personal associations emerged, and in this past July an internal BBC review found it breached the organization's journalistic standards on truthfulness.
A corporation official stated: "The regulator's decision is in line with the results of Peter Johnston's review, that there was a significant failing in the film in relation to the broadcaster's journalistic policies on truthfulness, which reflects regulation 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we agree with the regulator's ruling in complete. We will follow the penalty as soon as the date and wording are finalised."
