The public service broadcaster was found to have committed a "serious breach" of broadcasting rules by failing to disclose that the narrator of a film about the Gaza conflict was the son of a Hamas representative, according to British broadcasting authority Ofcom.
An inquiry by the media regulator into the programme Gaza: How to Survive a Warzone has concluded that the film was "significantly deceptive".
The head of the BBC had earlier expressed regret, stating there had been "a significant failing in relation to accuracy".
The regulator has directed the BBC to transmit a evening statement about its decisions.
"As this represents a significant violation of our regulations, we are directing the corporation to transmit a announcement of our conclusions against it on BBC Two at nine o'clock in the evening, with a date to be confirmed," the statement read.
'Possibility to Erode Confidence'
The regulator's statement said: "The inquiry we conducted determined that the programme's omission to reveal that the presenter's father held a role in the Hamas-run authority was materially misleading.
"This implied that the viewers did not have essential details which may have been very significant to their assessment of the voice and the information he provided.
"Credibility is at the center of the relationship between a media organization and its public, notably for a state-funded media outlet such as the public broadcaster.
"This failing had the potential to damage the significantly high levels of credibility that audiences would have invested in a documentary produced by the BBC about the Gaza conflict."
The programme was removed from the BBC's streaming service in February after the boy's personal associations were revealed, and in July an internal BBC review determined it infringed the organization's content policies on factual correctness.
A corporation official said: "The authority's determination is in agreement with the findings of the corporation's inquiry, that there was a serious error in the film in relation to the corporation's content standards on accuracy, which aligns with clause 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we agree with the regulator's ruling in its entirety. We will comply with the sanction as soon as the date and language are determined."
