The British broadcaster committed a "significant breach" of broadcasting rules by not revealing that the presenter of a documentary about the Gaza situation was the child of a Hamas administrator, as determined by UK media regulator Ofcom.
An inquiry by Ofcom into Gaza: How to Survive a Warzone has determined that the documentary was "materially misleading".
The head of the BBC had previously apologised, saying there had been "a major oversight in relation to factual correctness".
The authority has instructed the BBC to air a evening statement about its conclusions.
"Given this constitutes a significant violation of our rules, we are ordering the BBC to broadcast a announcement of our findings against it on BBC2 at 21:00, with a timing to be finalised," it said.
'Risk to Erode Trust'
The authority's announcement stated: "Our probe concluded that the programme's lack of disclosure that the voice's parent occupied a post in the Hamas-controlled administration was significantly deceptive.
"It meant that the viewers did not have critical information which may have been highly relevant to their assessment of the presenter and the information he shared.
"Trust is at the center of the connection between a television network and its public, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the potential to erode the exceptionally strong amounts of trust that the public would have put in a factual film from the broadcaster about the Gaza conflict."
The film was removed from the BBC's streaming service in last February after the narrator's family links were revealed, and in July an broadcaster's internal assessment concluded it violated the corporation's editorial guidelines on truthfulness.
A representative for the broadcaster commented: "The authority's determination is in line with the findings of the corporation's inquiry, that there was a serious error in the film in relation to the broadcaster's journalistic policies on accuracy, which reflects 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 follow the directive as soon as the timing and wording are confirmed."
