The public service broadcaster engaged in a "significant breach" of media regulations by failing to disclose that the presenter of a programme about the Gaza situation was the child of a Hamas administrator, as ruled by British broadcasting authority Ofcom.
An probe by the broadcasting watchdog into Gaza: How to Survive a Warzone has determined that the film was "materially misleading".
The chief executive of the broadcaster had previously apologised, noting there had been "a major oversight in relation to factual correctness".
The authority has instructed the BBC to transmit a prime-time declaration about its decisions.
"Since this amounts to a significant violation of our code, we are directing the corporation to transmit a message of our conclusions against it on the BBC's second channel at 21:00, with a date to be determined," the statement read.
'Possibility to Damage Confidence'
The authority's report said: "Our investigation determined that the film's lack of disclosure that the narrator's parent occupied a position in the Hamas-controlled administration was significantly deceptive.
"Consequently that the viewers did not have essential details which may have been extremely pertinent to their evaluation of the presenter and the content he presented.
"Credibility is at the center of the bond between a media organization and its public, especially for a public service broadcaster such as the BBC.
"This oversight had the possibility to undermine the exceptionally strong degrees of confidence that viewers would have placed in a documentary produced by the BBC about the conflict in Gaza."
The documentary was removed from iPlayer in February after the narrator's family links emerged, and in July an corporation's own inquiry concluded it breached the organization's editorial guidelines on truthfulness.
A BBC spokesperson stated: "The Ofcom ruling is in accordance with the results of the internal assessment, that there was a major oversight in the programme in relation to the BBC's Editorial Guidelines on factual correctness, which reflects regulation 2.2 of the regulator's media standards.
"We have apologised for this and we comply with the authority's determination in complete. We will comply with the directive as soon as the date and wording are finalised."
