The British broadcaster engaged in a "significant breach" of broadcasting rules by failing to disclose that the voice of a programme about the Gaza conflict was the son of a Hamas representative, as ruled by British broadcasting authority Ofcom.
An investigation by Ofcom into Gaza: How to Survive a Warzone has determined that the programme was "substantially inaccurate".
The BBC's director general had previously apologised, stating there had been "a major oversight in relation to factual correctness".
Ofcom has instructed the corporation to air a evening statement about its findings.
"As this represents a significant violation of our code, we are instructing the BBC to broadcast a announcement of our determinations against it on BBC2 at 21:00, with a timing to be confirmed," the regulator stated.
'Risk to Erode Confidence'
The authority's announcement stated: "The inquiry we conducted found that the film's omission to reveal that the narrator's male guardian served in a role in the Hamas-controlled administration was significantly deceptive.
"This implied that the public did not have critical information which may have been extremely pertinent to their judgment of the presenter and the details he shared.
"Trust is at the center of the connection between a television network and its viewers, especially for a public service broadcaster such as the public broadcaster.
"This failing had the possibility to undermine the exceptionally strong levels of confidence that viewers would have invested in a factual film from the broadcaster about the Gaza conflict."
The documentary was pulled from the BBC's streaming service in February after the presenter's familial connections emerged, and in July an broadcaster's internal assessment found it violated the corporation's content policies on accuracy.
A BBC spokesperson stated: "The authority's determination is in line with the conclusions of Peter Johnston's review, that there was a major oversight in the programme in relation to the broadcaster's journalistic policies on accuracy, which corresponds to Rule 2.2 of the regulator's media standards.
"We have apologised for this and we accept the regulator's ruling in full. We will comply with the directive as soon as the date and wording are confirmed."
