The British broadcaster engaged in a "major breach" of media regulations by omitting to mention that the narrator of a film about the Gaza conflict was the son of a Hamas official, as ruled by regulatory body Ofcom.
An inquiry by Ofcom into the documentary titled Gaza: How to Survive a Warzone has determined that the programme was "materially misleading".
The BBC's director general had already issued an apology, noting there had been "a major oversight in relation to truthfulness".
The regulator has instructed the corporation to air a prime-time declaration about its findings.
"Given this constitutes a significant violation of our regulations, we are ordering the broadcaster to broadcast a message of our findings against it on BBC2 at 21:00, with a schedule to be determined," the statement read.
'Risk to Undermine Confidence'
The watchdog's statement said: "Our probe concluded that the film's lack of disclosure that the narrator's parent held a role in the Hamas-controlled administration was materially misleading.
"Consequently that the audience did not have essential details which may have been very significant to their assessment of the voice and the information he shared.
"Credibility is at the core of the connection between a television network and its audience, particularly for a public service broadcaster such as the public broadcaster.
"This oversight had the potential to undermine the significantly high levels of confidence that audiences would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The film was withdrawn from iPlayer in the month of February after the presenter's family links came to light, and in this past July an internal BBC review concluded it infringed the organization's journalistic standards on accuracy.
A BBC spokesperson stated: "The Ofcom ruling is in line with the findings of the internal assessment, that there was a serious error in the documentary 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 agree with the regulator's ruling in its entirety. We will follow the sanction as soon as the schedule and wording are finalised."
