The British broadcaster committed a "serious breach" of broadcasting rules by omitting to mention that the voice of a programme about the Gaza conflict was the child of a Hamas official, as determined by British broadcasting authority Ofcom.
An inquiry by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has found that the film was "materially misleading".
The BBC's director general had previously apologised, saying there had been "a major oversight in relation to accuracy".
The regulator has directed the corporation to transmit a evening declaration about its conclusions.
"As this represents a major infringement of our code, we are ordering the corporation to air a message of our conclusions against it on BBC2 at 9pm, with a timing to be confirmed," the statement read.
'Risk to Damage Trust'
The watchdog's report declared: "Our probe determined that the programme's lack of disclosure that the presenter's male guardian held a post in the Hamas-controlled authority was materially misleading.
"This implied that the audience did not have essential details which may have been extremely pertinent to their evaluation of the voice and the information he provided.
"Trust is at the heart of the bond between a television network and its audience, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This oversight had the risk to damage the exceptionally strong degrees of credibility that the public would have placed in a factual film from the broadcaster about the Israel-Gaza war."
The film was pulled from the BBC's streaming service in the month of February after the boy's family links emerged, and in July an broadcaster's internal assessment determined it infringed the broadcaster's editorial guidelines on accuracy.
A BBC spokesperson said: "The authority's determination is in accordance with the findings of the corporation's inquiry, that there was a serious error in the programme in relation to the BBC's Editorial Guidelines on factual correctness, which corresponds to clause 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we comply with Ofcom's decision in its entirety. We will adhere to the penalty as soon as the timing and wording are finalised."
