The public service broadcaster engaged in a "major breach" of industry standards by omitting to mention that the voice of a programme about Gaza was the offspring of a Hamas representative, according to UK media regulator Ofcom.
An investigation by the media regulator into Gaza: How to Survive a Warzone has concluded that the programme was "significantly deceptive".
The chief executive of the broadcaster had already issued an apology, noting there had been "a significant failing in relation to factual correctness".
The regulator has instructed the corporation to transmit a evening statement about its findings.
"As this represents a serious breach of our code, we are directing the broadcaster to transmit a announcement of our conclusions against it on BBC Two at 21:00, with a timing to be confirmed," it said.
'Risk to Undermine Credibility'
The authority's statement said: "Our investigation determined that the film's omission to reveal that the presenter's male guardian held a role in the Hamas-run government was materially misleading.
"It meant that the viewers did not have vital facts which may have been extremely pertinent to their evaluation of the presenter and the content he presented.
"Credibility is at the heart of the bond between a television network and its viewers, particularly for a public service broadcaster such as the public broadcaster.
"This oversight had the risk to undermine the very considerable levels of credibility that the public would have placed in a documentary produced by the BBC about the conflict in Gaza."
The film was removed from the online platform in February after the presenter's family links emerged, and in this past July an internal BBC review determined it violated the broadcaster's content policies on factual correctness.
A BBC spokesperson commented: "The regulator's decision is in accordance with the results of the internal assessment, that there was a major oversight in the programme in relation to the corporation's content standards on factual correctness, which aligns with clause 2.2 of the regulator's media standards.
"We expressed regret for this and we agree with the authority's determination in complete. We will adhere to the directive as soon as the timing and language are confirmed."
