The BBC engaged in a "significant breach" of broadcasting rules by failing to disclose that the voice of a programme about Gaza was the offspring of a Hamas representative, as determined by British broadcasting authority Ofcom.
An inquiry by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the documentary was "materially misleading".
The BBC's director general had earlier expressed regret, stating there had been "a major oversight in relation to truthfulness".
Ofcom has ordered the corporation to broadcast a prime-time statement about its decisions.
"Given this constitutes a serious breach of our regulations, we are instructing the BBC to air a statement of our determinations against it on BBC2 at 21:00, with a timing to be finalised," it said.
'Risk to Erode Credibility'
The authority's statement declared: "Our investigation concluded that the programme's failure to disclose that the narrator's male guardian occupied a position in the Hamas-administered authority was materially misleading.
"This implied that the public did not have vital facts which may have been extremely pertinent to their assessment of the narrator and the content he presented.
"Trust is at the heart of the relationship between a broadcaster and its audience, notably for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the possibility to undermine the significantly high amounts of trust that the public would have invested in a factual film from the broadcaster about the Israel-Gaza war."
The programme was pulled from the online platform in the month of February after the narrator's personal associations came to light, and in the month of July an internal BBC review concluded it breached the broadcaster's content policies on truthfulness.
A corporation official stated: "The authority's determination is in line with the findings of the corporation's inquiry, that there was a serious error in the programme in relation to the corporation's content standards on factual correctness, which corresponds to clause 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we accept the regulator's ruling in complete. We will adhere to the directive as soon as the schedule and language are finalised."
