The public service broadcaster committed a "major breach" of industry standards by failing to disclose that the narrator of a programme about the Gaza conflict was the child of a Hamas official, as ruled by UK media regulator Ofcom.
An investigation by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has determined that the film was "substantially inaccurate".
The BBC's director general had earlier expressed regret, stating there had been "a major oversight in relation to accuracy".
The authority has directed the broadcaster to broadcast a prime-time declaration about its findings.
"Since this amounts to a significant violation of our rules, we are ordering the BBC to air a announcement of our findings against it on BBC Two at 21:00, with a date to be determined," the regulator stated.
'Possibility to Erode Credibility'
The authority's statement stated: "The inquiry we conducted determined that the film's omission to reveal that the narrator's father occupied a role in the Hamas-administered administration was materially misleading.
"It meant that the public did not have vital facts which may have been highly relevant to their evaluation of the narrator and the content he provided.
"Trust is at the core of the connection between a media organization and its viewers, especially for a public service broadcaster such as the British Broadcasting Corporation.
"This error had the possibility to undermine the significantly high levels of confidence that audiences would have placed in a documentary produced by the BBC about the Israel-Gaza war."
The documentary was pulled from iPlayer in February after the narrator's family links came to light, and in the month of July an broadcaster's internal assessment determined it infringed the broadcaster's editorial guidelines on factual correctness.
A BBC spokesperson stated: "The authority's determination is in accordance with the results of Peter Johnston's review, that there was a significant failing in the documentary in relation to the corporation's content standards on truthfulness, which aligns with regulation 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we accept the authority's determination in complete. We will adhere to the directive as soon as the date and language are determined."
