The British broadcaster engaged in a "significant breach" of broadcasting rules by failing to disclose that the voice of a programme about the Gaza situation was the offspring of a Hamas representative, according to regulatory body Ofcom.
An probe by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the film was "materially misleading".
The BBC's director general had earlier expressed regret, stating there had been "a major oversight in relation to factual correctness".
Ofcom has directed the broadcaster to transmit a evening declaration about its decisions.
"Since this amounts to a significant violation of our rules, we are ordering the BBC to broadcast a statement of our determinations against it on BBC2 at 9pm, with a date to be confirmed," the statement read.
'Risk to Damage Credibility'
The watchdog's statement declared: "Our investigation found that the programme's lack of disclosure that the voice's male guardian occupied a position in the Hamas-administered authority was significantly deceptive.
"This implied that the public did not have essential details which may have been extremely pertinent to their assessment of the presenter and the details he provided.
"Credibility is at the center of the connection between a television network and its public, notably for a state-funded media outlet such as the public broadcaster.
"This failing had the potential to undermine the exceptionally strong degrees of trust that viewers would have put in a documentary produced by the BBC about the Israel-Gaza war."
The documentary was pulled from the online platform in February after the narrator's familial connections were revealed, and in this past July an broadcaster's internal assessment found it breached the broadcaster's journalistic standards on factual correctness.
A corporation official stated: "The regulator's decision is in accordance with the conclusions of Peter Johnston's review, that there was a serious error in the documentary in relation to the corporation's content standards on factual correctness, which aligns with clause 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we agree with the authority's determination in complete. We will comply with the directive as soon as the date and language are confirmed."