The British broadcaster was found to have committed a "major breach" of media regulations by omitting to mention that the voice of a programme about the Gaza conflict was the child of a Hamas official, as determined by British broadcasting authority Ofcom.
An probe by Ofcom into Gaza: How to Survive a Warzone has determined that the film was "significantly deceptive".
The chief executive of the broadcaster had earlier expressed regret, noting there had been "a significant failing in relation to truthfulness".
Ofcom has instructed the corporation to transmit a peak-time statement about its decisions.
"As this represents a significant violation of our regulations, we are ordering the BBC to broadcast a message of our conclusions against it on BBC Two at 21:00, with a date to be determined," it said.
'Risk to Erode Trust'
The watchdog's statement declared: "The inquiry we conducted determined that the documentary's omission to reveal that the narrator's male guardian served in a position in the Hamas-run administration was materially misleading.
"This implied that the audience did not have vital facts which may have been very significant to their judgment of the narrator and the details he shared.
"Trust is at the core of the bond between a media organization and its viewers, especially for a state-funded media outlet such as the BBC.
"This oversight had the risk to damage the exceptionally strong levels of trust that the public would have put in a BBC factual programme about the conflict in Gaza."
The programme was withdrawn from the online platform in last February after the boy's familial connections came to light, and in the month of July an internal BBC review determined it infringed the broadcaster's content policies on accuracy.
A representative for the broadcaster stated: "The authority's determination is in accordance with the findings of the corporation's inquiry, that there was a major oversight in the programme in relation to the BBC's Editorial Guidelines on factual correctness, which corresponds to clause 2.2 of the regulator's media standards.
"We expressed regret for this and we comply with the regulator's ruling in complete. We will follow the penalty as soon as the date and language are finalised."
