The British broadcaster engaged in a "major breach" of broadcasting rules by omitting to mention that the presenter of a programme about the Gaza situation was the child of a Hamas official, as ruled by UK media regulator Ofcom.
An inquiry by the media regulator into Gaza: How to Survive a Warzone has concluded that the programme was "materially misleading".
The head of the BBC had previously apologised, saying there had been "a significant failing in relation to accuracy".
The authority has ordered the broadcaster to air a prime-time announcement about its conclusions.
"Given this constitutes a significant violation of our rules, we are directing the broadcaster to air a announcement of our conclusions against it on BBC2 at 21:00, with a date to be finalised," the regulator stated.
'Possibility to Erode Trust'
The authority's report declared: "The inquiry we conducted found that the documentary's lack of disclosure that the presenter's parent held a position in the Hamas-administered government was substantially inaccurate.
"This implied that the viewers did not have essential details which may have been very significant to their judgment of the narrator and the information he presented.
"Confidence is at the core of the connection between a television network and its public, especially for a national broadcasting corporation such as the BBC.
"This error had the possibility to undermine the significantly high degrees of confidence that viewers would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The documentary was withdrawn from iPlayer in last February after the presenter's familial connections were revealed, and in the month of July an broadcaster's internal assessment concluded it infringed the organization's journalistic standards on accuracy.
A representative for the broadcaster stated: "The regulator's decision is in accordance with the findings of the internal assessment, that there was a serious error in the programme in relation to the corporation's content standards on factual correctness, which corresponds to Rule 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we comply with the authority's determination in its entirety. We will adhere to the directive as soon as the timing and wording are determined."
