The public service broadcaster was found to have committed a "significant breach" of media regulations by failing to disclose that the presenter of a documentary about Gaza was the offspring of a Hamas administrator, as ruled by regulatory body Ofcom.
An probe by Ofcom into the programme Gaza: How to Survive a Warzone has concluded that the programme was "materially misleading".
The head of the BBC had previously apologised, stating there had been "a major oversight in relation to accuracy".
The authority has directed the corporation to air a peak-time declaration about its conclusions.
"Since this amounts to a significant violation of our code, we are instructing the broadcaster to air a announcement of our findings against it on BBC Two at 21:00, with a timing to be confirmed," the statement read.
'Potential to Undermine Trust'
The regulator's report stated: "Our investigation concluded that the programme's omission to reveal that the voice's male guardian held a position in the Hamas-run administration was substantially inaccurate.
"It meant that the public did not have essential details which may have been highly relevant to their evaluation of the voice and the information he shared.
"Confidence is at the center of the relationship between a broadcaster and its public, particularly for a public service broadcaster such as the BBC.
"This error had the possibility to erode the very considerable amounts of credibility that the public would have put in a documentary produced by the BBC about the Israel-Gaza war."
The documentary was pulled from the BBC's streaming service in the month of February after the narrator's familial connections came to light, and in this past July an broadcaster's internal assessment concluded it breached the corporation's editorial guidelines on truthfulness.
A representative for the broadcaster said: "The authority's determination is in accordance with the findings of the internal assessment, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on accuracy, which reflects regulation 2.2 of the regulator's media standards.
"We issued an apology for this and we comply with the regulator's ruling in its entirety. We will comply with the directive as soon as the timing and language are confirmed."
