The British broadcaster engaged in a "major breach" of broadcasting rules by omitting to mention that the voice of a programme about the Gaza situation was the child of a Hamas administrator, as ruled by British broadcasting authority Ofcom.
An investigation by the media regulator into Gaza: How to Survive a Warzone has concluded that the programme was "significantly deceptive".
The BBC's director general had already issued an apology, stating there had been "a serious error in relation to factual correctness".
The authority has instructed the broadcaster to broadcast a peak-time announcement about its decisions.
"As this represents a major infringement of our regulations, we are ordering the corporation to air a statement of our determinations against it on BBC2 at 21:00, with a timing to be confirmed," the regulator stated.
'Possibility to Undermine Credibility'
The regulator's statement said: "Our probe concluded that the film's lack of disclosure that the presenter's father held a role in the Hamas-controlled authority was significantly deceptive.
"Consequently that the viewers did not have critical information which may have been very significant to their assessment of the narrator and the information he shared.
"Trust is at the heart of the connection between a television network and its public, particularly for a national broadcasting corporation such as the British Broadcasting Corporation.
"This error had the possibility to damage the significantly high levels of trust that viewers would have invested in a BBC factual programme about the Israel-Gaza war."
The programme was withdrawn from the BBC's streaming service in February after the presenter's family links came to light, and in July an broadcaster's internal assessment found it violated the corporation's content policies on accuracy.
A representative for the broadcaster said: "The Ofcom ruling is in agreement with the findings of the internal assessment, that there was a significant failing in the programme in relation to the broadcaster's journalistic policies on accuracy, which reflects Rule 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we accept the authority's determination in its entirety. We will adhere to the sanction as soon as the schedule and wording are determined."
