The British broadcaster was found to have committed a "major breach" of industry standards by omitting to mention that the presenter of a documentary about the Gaza conflict was the child of a Hamas representative, as ruled by UK media regulator Ofcom.
An investigation by the media regulator into Gaza: How to Survive a Warzone has concluded that the documentary was "materially misleading".
The chief executive of the broadcaster had already issued an apology, saying there had been "a major oversight in relation to truthfulness".
Ofcom has instructed the corporation to broadcast a peak-time declaration about its conclusions.
"As this represents a serious breach of our rules, we are directing the corporation to broadcast a message of our determinations against it on BBC Two at 9pm, with a timing to be confirmed," the regulator stated.
'Possibility to Erode Credibility'
The regulator's statement said: "The inquiry we conducted concluded that the programme's lack of disclosure that the presenter's male guardian held a role in the Hamas-administered administration was materially misleading.
"Consequently that the audience did not have essential details which may have been very significant to their evaluation of the narrator and the content he shared.
"Trust is at the heart of the bond between a media organization and its public, particularly for a public service broadcaster such as the BBC.
"This failing had the potential to erode the very considerable degrees of credibility that viewers would have placed in a BBC factual programme about the conflict in Gaza."
The film was removed from the online platform in last February after the presenter's family links were revealed, and in July an corporation's own inquiry found it infringed the corporation's content policies on factual correctness.
A BBC spokesperson said: "The Ofcom ruling is in line with the findings of the corporation's inquiry, that there was a significant failing in the film in relation to the corporation's content standards on truthfulness, which corresponds to regulation 2.2 of the regulator's media standards.
"We expressed regret for this and we agree with the authority's determination in full. We will comply with the sanction as soon as the date and wording are finalised."
