The public service broadcaster committed a "major breach" of broadcasting rules by not revealing that the narrator of a film about the Gaza situation was the offspring of a Hamas representative, as ruled by regulatory body Ofcom.
An investigation by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has determined that the programme was "significantly deceptive".
The chief executive of the broadcaster had previously apologised, noting there had been "a major oversight in relation to truthfulness".
The regulator has ordered the broadcaster to transmit a evening announcement about its decisions.
"Given this constitutes a major infringement of our regulations, we are instructing the BBC to broadcast a announcement of our conclusions against it on BBC Two at nine o'clock in the evening, with a date to be determined," it said.
'Risk to Erode Credibility'
The watchdog's statement said: "Our investigation found that the programme's failure to disclose that the presenter's male guardian served in a role in the Hamas-administered authority was substantially inaccurate.
"This implied that the audience did not have critical information which may have been very significant to their evaluation of the narrator and the details he shared.
"Trust is at the core of the relationship between a broadcaster and its viewers, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This oversight had the possibility to damage the exceptionally strong amounts of trust that the public would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The programme was removed from the BBC's streaming service in February after the boy's family links were revealed, and in the month of July an corporation's own inquiry concluded it breached the corporation's content policies on accuracy.
A corporation official commented: "The regulator's decision is in line with the results of the corporation's inquiry, that there was a serious error in the documentary in relation to the BBC's Editorial Guidelines on truthfulness, which reflects clause 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we comply with the regulator's ruling in complete. We will adhere to the penalty as soon as the timing and language are confirmed."
