The British broadcaster engaged in a "serious breach" of industry standards by failing to disclose that the presenter of a programme about the Gaza situation was the son of a Hamas administrator, as ruled by regulatory body Ofcom.
An probe by the broadcasting watchdog into Gaza: How to Survive a Warzone has concluded that the film was "significantly deceptive".
The chief executive of the broadcaster had earlier expressed regret, saying there had been "a major oversight in relation to truthfulness".
The regulator has ordered the corporation to transmit a prime-time announcement about its findings.
"Since this amounts to a significant violation of our code, we are ordering the BBC to air a message of our findings against it on the BBC's second channel at 9pm, with a timing to be finalised," it said.
'Possibility to Damage Confidence'
The watchdog's report stated: "Our investigation determined that the film's lack of disclosure that the narrator's father occupied a position in the Hamas-controlled authority was materially misleading.
"Consequently that the audience did not have critical information which may have been highly relevant to their judgment of the presenter and the content he shared.
"Confidence is at the center of the bond between a television network and its public, especially for a state-funded media outlet such as the public broadcaster.
"This error had the potential to damage the exceptionally strong levels of trust that viewers would have placed in a factual film from the broadcaster about the Israel-Gaza war."
The film was removed from the BBC's streaming service in February after the boy's familial connections were revealed, and in the month of July an broadcaster's internal assessment concluded it infringed the corporation's journalistic standards on accuracy.
A representative for the broadcaster commented: "The authority's determination is in accordance with the conclusions of the corporation's inquiry, that there was a significant failing in the documentary in relation to the broadcaster's journalistic policies on truthfulness, which reflects clause 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we agree with the authority's determination in complete. We will adhere to the sanction as soon as the timing and wording are determined."
