The British broadcaster committed a "significant breach" of industry standards by failing to disclose that the voice of a documentary about Gaza was the offspring of a Hamas representative, as determined by regulatory body Ofcom.
An investigation by Ofcom into Gaza: How to Survive a Warzone has found that the documentary was "substantially inaccurate".
The head of the BBC had already issued an apology, stating there had been "a serious error in relation to factual correctness".
The authority has instructed the BBC to transmit a evening statement about its conclusions.
"Since this amounts to a major infringement of our rules, we are directing the BBC to broadcast a message of our findings against it on BBC Two at 9pm, with a timing to be confirmed," the regulator stated.
'Risk to Erode Confidence'
The authority's report stated: "Our probe found that the programme's failure to disclose that the presenter's male guardian served in a role in the Hamas-run authority was materially misleading.
"It meant that the viewers did not have critical information which may have been extremely pertinent to their assessment of the presenter and the details he shared.
"Credibility is at the core of the bond between a broadcaster and its audience, especially for a state-funded media outlet such as the public broadcaster.
"This error had the potential to erode the very considerable degrees of trust that the public would have invested in a factual film from the broadcaster about the Israel-Gaza war."
The documentary was pulled from the online platform in the month of February after the presenter's family links emerged, and in this past July an broadcaster's internal assessment determined it breached the organization's content policies on truthfulness.
A BBC spokesperson stated: "The regulator's decision is in line with the findings of the corporation's inquiry, that there was a serious error in the documentary in relation to the broadcaster's journalistic policies on accuracy, which reflects regulation 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we comply with Ofcom's decision in full. We will follow the penalty as soon as the date and language are confirmed."
