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 the Gaza conflict was the child of a Hamas administrator, according to regulatory body Ofcom.
An investigation by Ofcom into the programme Gaza: How to Survive a Warzone has found that the film was "significantly deceptive".
The head of the BBC had already issued an apology, stating there had been "a significant failing in relation to accuracy".
The authority has ordered the corporation to transmit a evening declaration about its conclusions.
"Since this amounts to a major infringement of our code, we are ordering the corporation to air a announcement of our conclusions against it on BBC2 at 9pm, with a schedule to be finalised," it said.
'Risk to Damage Trust'
The authority's report declared: "Our investigation determined that the film's omission to reveal that the voice's male guardian served in a post in the Hamas-run administration was substantially inaccurate.
"This implied that the audience did not have critical information which may have been highly relevant to their assessment of the narrator and the details he shared.
"Trust is at the center of the relationship between a television network and its public, especially for a public service broadcaster such as the BBC.
"This error had the potential to undermine the significantly high amounts of trust that the public would have put in a documentary produced by the BBC about the conflict in Gaza."
The documentary was pulled from the BBC's streaming service in February after the boy's familial connections were revealed, and in this past July an internal BBC review concluded it infringed the corporation's journalistic standards on accuracy.
A BBC spokesperson stated: "The regulator's decision is in agreement with the findings of the internal assessment, that there was a significant failing in the film in relation to the corporation's content standards on truthfulness, which reflects regulation 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we agree with Ofcom's decision in complete. We will adhere to the sanction as soon as the timing and language are finalised."
