The BBC committed a "significant breach" of industry standards by not revealing that the voice of a film about Gaza was the child of a Hamas administrator, according to British broadcasting authority Ofcom.
An probe by the media regulator into the documentary titled Gaza: How to Survive a Warzone has concluded that the programme was "substantially inaccurate".
The chief executive of the broadcaster had earlier expressed regret, stating there had been "a serious error in relation to accuracy".
The authority has ordered the corporation to air a peak-time statement about its decisions.
"Given this constitutes a significant violation of our code, we are ordering the BBC to broadcast a announcement of our conclusions against it on BBC2 at 21:00, with a schedule to be determined," the statement read.
'Risk to Undermine Confidence'
The regulator's statement said: "The inquiry we conducted concluded that the programme's failure to disclose that the voice's parent held a role in the Hamas-administered administration was substantially inaccurate.
"Consequently that the viewers did not have essential details which may have been extremely pertinent to their judgment of the presenter and the content he provided.
"Credibility is at the center of the connection between a television network and its viewers, notably for a public service broadcaster such as the British Broadcasting Corporation.
"This error had the risk to erode the very considerable amounts of trust that the public would have placed in a factual film from the broadcaster about the conflict in Gaza."
The documentary was removed from the online platform in the month of February after the narrator's familial connections emerged, and in July an corporation's own inquiry concluded it breached the organization's journalistic standards on truthfulness.
A representative for the broadcaster commented: "The regulator's decision is in line with the conclusions of Peter Johnston's review, that there was a significant failing in the film in relation to the broadcaster's journalistic policies on accuracy, which corresponds to Rule 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we agree with the regulator's ruling in complete. We will follow the sanction as soon as the schedule and language are determined."
