The public service broadcaster was found to have committed a "serious breach" of industry standards by not revealing that the narrator of a film about Gaza was the son of a Hamas administrator, according to British broadcasting authority Ofcom.
An probe by Ofcom into the programme Gaza: How to Survive a Warzone has found that the documentary was "significantly deceptive".
The chief executive of the broadcaster had earlier expressed regret, saying there had been "a significant failing in relation to factual correctness".
The regulator has directed the BBC to transmit a peak-time announcement about its conclusions.
"Since this amounts to a major infringement of our code, we are instructing the broadcaster to broadcast a message of our determinations against it on BBC Two at 9pm, with a timing to be confirmed," the regulator stated.
'Risk to Damage Confidence'
The watchdog's announcement said: "Our investigation concluded that the programme's lack of disclosure that the voice's male guardian served in a role in the Hamas-controlled administration was significantly deceptive.
"It meant that the audience did not have vital facts which may have been highly relevant to their judgment of the narrator and the information he provided.
"Trust is at the heart of the connection between a television network and its viewers, particularly for a public service broadcaster such as the British Broadcasting Corporation.
"This failing had the potential to erode the very considerable levels of trust that viewers would have placed in a documentary produced by the BBC about the Israel-Gaza war."
The documentary was removed from iPlayer in February after the boy's family links came to light, and in the month of July an corporation's own inquiry found it infringed the broadcaster's journalistic standards on truthfulness.
A corporation official stated: "The authority's determination is in line with the conclusions of the corporation's inquiry, that there was a major oversight in the programme in relation to the corporation's content standards on truthfulness, which aligns with clause 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we comply with the authority's determination in full. We will adhere to the directive as soon as the schedule and language are confirmed."
