The British broadcaster committed a "major breach" of media regulations by not revealing that the presenter of a programme about the Gaza situation was the child of a Hamas representative, according to regulatory body Ofcom.
An investigation by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has found that the documentary was "substantially inaccurate".
The chief executive of the broadcaster had already issued an apology, stating there had been "a major oversight in relation to accuracy".
Ofcom has directed the corporation to transmit a prime-time declaration about its conclusions.
"Since this amounts to a significant violation of our regulations, we are ordering the corporation to transmit a statement of our determinations against it on BBC Two at 9pm, with a schedule to be determined," the statement read.
'Possibility to Erode Confidence'
The watchdog's report stated: "The inquiry we conducted found that the documentary's failure to disclose that the presenter's father occupied a role in the Hamas-controlled administration was significantly deceptive.
"This implied that the viewers did not have vital facts which may have been very significant to their evaluation of the voice and the details he presented.
"Credibility is at the center of the connection between a television network and its viewers, especially for a public service broadcaster such as the public broadcaster.
"This error had the risk to damage the very considerable amounts of trust that viewers would have placed in a BBC factual programme about the conflict in Gaza."
The film was withdrawn from the online platform in the month of February after the presenter's family links were revealed, and in July an internal BBC review concluded it infringed the corporation's journalistic standards on truthfulness.
A representative for the broadcaster commented: "The Ofcom ruling is in agreement with the results of Peter Johnston's review, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on accuracy, which corresponds to Rule 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we accept Ofcom's decision in complete. We will comply with the directive as soon as the date and wording are finalised."