The BBC engaged in a "serious breach" of industry standards by omitting to mention that the narrator of a programme about Gaza was the child of a Hamas representative, as determined by UK media regulator Ofcom.
An investigation by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has determined that the programme was "substantially inaccurate".
The head of the BBC had previously apologised, noting there had been "a significant failing in relation to accuracy".
The authority has directed the corporation to transmit a evening announcement about its conclusions.
"Given this constitutes a major infringement of our rules, we are ordering the corporation to air a announcement of our findings against it on BBC Two at 21:00, with a date to be finalised," the statement read.
'Risk to Erode Credibility'
The regulator's announcement said: "Our investigation concluded that the programme's lack of disclosure that the narrator's father occupied a post in the Hamas-controlled authority was substantially inaccurate.
"It meant that the audience did not have vital facts which may have been extremely pertinent to their assessment of the voice and the content he shared.
"Credibility is at the center of the connection between a media organization and its public, notably for a public service broadcaster such as the BBC.
"This oversight had the possibility to undermine the exceptionally strong levels of confidence that audiences would have invested in a documentary produced by the BBC about the conflict in Gaza."
The film was pulled from the online platform in February after the presenter's familial connections emerged, and in this past July an broadcaster's internal assessment found it breached the organization's editorial guidelines on accuracy.
A corporation official stated: "The regulator's decision is in agreement with the findings of Peter Johnston's review, that there was a major oversight in the film in relation to the corporation's content standards on accuracy, which corresponds to clause 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 adhere to the directive as soon as the schedule and wording are determined."
