The BBC was found to have committed a "major breach" of industry standards by not revealing that the voice of a programme about the Gaza situation was the child of a Hamas official, as ruled by UK media regulator Ofcom.
An inquiry by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has concluded that the film was "materially misleading".
The BBC's director general had earlier expressed regret, stating there had been "a serious error in relation to truthfulness".
The authority has instructed the broadcaster to broadcast a evening announcement about its findings.
"Since this amounts to a major infringement of our code, we are directing the broadcaster to broadcast a statement of our determinations against it on BBC2 at 9pm, with a date to be confirmed," the regulator stated.
'Possibility to Damage Credibility'
The authority's report said: "Our investigation determined that the programme's lack of disclosure that the presenter's male guardian held a position in the Hamas-run authority was substantially inaccurate.
"Consequently that the audience did not have essential details which may have been extremely pertinent to their judgment of the presenter and the details he provided.
"Credibility is at the core of the connection between a television network and its public, particularly for a public service broadcaster such as the public broadcaster.
"This oversight had the possibility to damage the exceptionally strong amounts of confidence that audiences would have put in a BBC factual programme about the conflict in Gaza."
The programme was removed from the online platform in February after the boy's familial connections came to light, and in this past July an broadcaster's internal assessment found it breached the organization's editorial guidelines on truthfulness.
A corporation official said: "The regulator's decision is in agreement with the conclusions of the corporation's inquiry, that there was a significant failing in the documentary in relation to the BBC's Editorial Guidelines on accuracy, which corresponds to regulation 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept the authority's determination in complete. We will follow the penalty as soon as the date and language are finalised."
