The British broadcaster engaged in a "significant breach" of industry standards by not revealing that the presenter of a documentary about Gaza was the offspring of a Hamas representative, according to regulatory body Ofcom.
An investigation by the broadcasting watchdog into Gaza: How to Survive a Warzone has found that the programme was "substantially inaccurate".
The chief executive of the broadcaster had previously apologised, saying there had been "a significant failing in relation to accuracy".
The regulator has directed the BBC to broadcast a evening statement about its findings.
"As this represents a significant violation of our rules, we are instructing the broadcaster to transmit a message of our findings against it on BBC Two at 21:00, with a timing to be determined," it said.
'Risk to Undermine Trust'
The watchdog's announcement declared: "Our probe determined that the programme's failure to disclose that the voice's father served in a position in the Hamas-run administration was significantly deceptive.
"It meant that the audience did not have essential details which may have been extremely pertinent to their judgment of the voice and the details he provided.
"Credibility is at the heart of the bond between a broadcaster and its public, notably for a public service broadcaster such as the public broadcaster.
"This oversight had the potential to undermine the very considerable degrees of trust that audiences would have placed in a documentary produced by the BBC about the Israel-Gaza war."
The film was withdrawn from the BBC's streaming service in last February after the boy's family links emerged, and in July an internal BBC review found it breached the corporation's content policies on factual correctness.
A corporation official stated: "The regulator's decision is in line with the findings of the internal assessment, that there was a significant failing in the documentary in relation to the BBC's Editorial Guidelines on truthfulness, which corresponds to regulation 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we accept Ofcom's decision in full. We will follow the directive as soon as the date and language are determined."
