The public service broadcaster was found to have committed a "serious breach" of broadcasting rules by omitting to mention that the voice of a documentary about the Gaza conflict was the offspring of a Hamas official, as ruled by British broadcasting authority Ofcom.
An inquiry by the broadcasting watchdog into Gaza: How to Survive a Warzone has determined that the film was "materially misleading".
The head of the BBC had previously apologised, noting there had been "a significant failing in relation to factual correctness".
The regulator has directed the corporation to broadcast a prime-time statement about its findings.
"Since this amounts to a serious breach of our code, we are instructing the broadcaster to broadcast a statement of our findings against it on BBC Two at 21:00, with a timing to be confirmed," the statement read.
'Potential to Erode Trust'
The authority's announcement stated: "The inquiry we conducted concluded that the film's lack of disclosure that the presenter's male guardian served in a position in the Hamas-controlled authority was materially misleading.
"This implied that the viewers did not have vital facts which may have been very significant to their evaluation of the voice and the content he shared.
"Credibility is at the heart of the relationship between a media organization and its viewers, particularly for a state-funded media outlet such as the public broadcaster.
"This error had the potential to erode the very considerable levels of credibility that the public would have invested in a BBC factual programme about the Gaza conflict."
The programme was pulled from iPlayer in February after the presenter's personal associations emerged, and in this past July an corporation's own inquiry found it infringed the broadcaster's journalistic standards on accuracy.
A corporation official commented: "The Ofcom ruling is in accordance with the conclusions of the internal assessment, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on factual correctness, which aligns with clause 2.2 of the regulator's media standards.
"We have apologised for this and we accept Ofcom's decision in full. We will adhere to the sanction as soon as the timing and wording are determined."
