The public service broadcaster engaged in a "serious breach" of industry standards by not revealing that the narrator of a programme about the Gaza situation was the child of a Hamas representative, as determined by UK media regulator Ofcom.
An probe by Ofcom into the programme Gaza: How to Survive a Warzone has found that the film was "materially misleading".
The BBC's director general had already issued an apology, stating there had been "a significant failing in relation to factual correctness".
The authority has ordered the broadcaster to broadcast a prime-time declaration about its findings.
"Since this amounts to a serious breach of our regulations, we are directing the corporation to air a announcement of our conclusions against it on the BBC's second channel at 9pm, with a timing to be determined," it said.
'Possibility to Erode Credibility'
The regulator's report declared: "Our investigation concluded that the documentary's failure to disclose that the narrator's male guardian occupied a role in the Hamas-controlled government was substantially inaccurate.
"This implied that the audience did not have essential details which may have been very significant to their assessment 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 undermine the exceptionally strong amounts of credibility that the public would have placed in a BBC factual programme about the Gaza conflict."
The film was withdrawn from the BBC's streaming service in the month of February after the presenter's personal associations were revealed, and in the month of July an corporation's own inquiry concluded it infringed the broadcaster's content policies on factual correctness.
A BBC spokesperson stated: "The Ofcom ruling is in agreement with the conclusions of the corporation's inquiry, that there was a significant failing in the programme in relation to the corporation's content standards on accuracy, which corresponds to regulation 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we comply with Ofcom's decision in full. We will adhere to the directive as soon as the date and wording are determined."
