The British broadcaster was found to have committed a "major breach" of industry standards by not revealing that the voice of a programme about Gaza was the son of a Hamas representative, as ruled by UK media regulator Ofcom.
An probe by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has determined that the film was "significantly deceptive".
The chief executive of the broadcaster had earlier expressed regret, stating there had been "a significant failing in relation to truthfulness".
The regulator has directed the BBC to broadcast a evening declaration about its conclusions.
"As this represents a major infringement of our rules, we are directing the broadcaster to broadcast a statement of our conclusions against it on BBC Two at 9pm, with a schedule to be determined," it said.
'Potential to Undermine Trust'
The watchdog's report stated: "Our probe determined that the documentary's failure to disclose that the voice's male guardian served in a post in the Hamas-controlled administration was materially misleading.
"This implied that the public did not have vital facts which may have been highly relevant to their judgment of the presenter and the content he shared.
"Trust is at the heart of the bond between a media organization and its viewers, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the potential to erode the very considerable levels of confidence that viewers would have placed in a documentary produced by the BBC about the Israel-Gaza war."
The programme was pulled from iPlayer in last February after the presenter's family links were revealed, and in this past July an corporation's own inquiry found it infringed the organization's journalistic standards on factual correctness.
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 film in relation to the corporation's content standards on truthfulness, which reflects Rule 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we agree with Ofcom's decision in complete. We will follow the directive as soon as the schedule and wording are determined."
