The public service broadcaster engaged in a "significant breach" of media regulations by omitting to mention that the narrator of a programme about Gaza was the son of a Hamas administrator, as ruled by British broadcasting authority Ofcom.
An investigation by Ofcom into the programme Gaza: How to Survive a Warzone has found that the documentary was "materially misleading".
The chief executive of the broadcaster had already issued an apology, stating there had been "a significant failing in relation to factual correctness".
Ofcom has ordered the broadcaster to transmit a prime-time declaration about its decisions.
"Since this amounts to a major infringement of our rules, we are directing the corporation to transmit a statement of our findings against it on BBC Two at 9pm, with a date to be finalised," it said.
'Risk to Undermine Trust'
The authority's statement stated: "The inquiry we conducted determined that the documentary's lack of disclosure that the narrator's parent occupied a position in the Hamas-administered authority was materially misleading.
"Consequently that the audience did not have essential details which may have been highly relevant to their assessment of the presenter and the content he provided.
"Trust is at the core of the relationship between a media organization and its public, particularly for a national broadcasting corporation such as the BBC.
"This error had the risk to erode the very considerable levels of confidence that the public would have invested in a BBC factual programme about the Israel-Gaza war."
The film was withdrawn from the online platform in the month of February after the presenter's family links came to light, and in July an broadcaster's internal assessment determined it infringed the broadcaster's journalistic standards on accuracy.
A BBC spokesperson said: "The Ofcom ruling is in line with the findings of the internal assessment, that there was a major oversight in the documentary in relation to the BBC's Editorial Guidelines on accuracy, which aligns with Rule 2.2 of the regulator's media standards.
"We issued an apology for this and we accept the authority's determination in complete. We will comply with the sanction as soon as the schedule and language are finalised."
