The public service broadcaster engaged in a "significant breach" of media regulations by omitting to mention that the narrator of a film about Gaza was the offspring of a Hamas administrator, according to UK media regulator Ofcom.
An probe by the broadcasting watchdog into Gaza: How to Survive a Warzone has found that the programme was "significantly deceptive".
The chief executive of the broadcaster had already issued an apology, saying there had been "a serious error in relation to truthfulness".
The authority has instructed the corporation to air a prime-time announcement about its conclusions.
"Since this amounts to a serious breach of our code, we are instructing the corporation to transmit a announcement of our findings against it on BBC2 at 9pm, with a timing to be finalised," the statement read.
'Risk to Undermine Trust'
The watchdog's statement declared: "Our investigation found that the film's omission to reveal that the voice's father occupied a role in the Hamas-run administration was significantly deceptive.
"It meant that the public did not have vital facts which may have been very significant to their assessment of the presenter and the information he presented.
"Credibility is at the heart of the relationship between a television network and its public, especially for a national broadcasting corporation such as the public broadcaster.
"This failing had the potential to undermine the significantly high levels of confidence that the public would have invested in a factual film from the broadcaster about the conflict in Gaza."
The documentary was withdrawn from the BBC's streaming service in February after the boy's personal associations emerged, and in the month of July an broadcaster's internal assessment found it infringed the organization's journalistic standards on truthfulness.
A representative for the broadcaster stated: "The authority's determination is in agreement with the findings of the corporation's inquiry, that there was a major oversight in the documentary in relation to the corporation's content standards on factual correctness, which aligns with regulation 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we comply with the regulator's ruling in its entirety. We will follow the penalty as soon as the schedule and language are finalised."
