The public service broadcaster committed a "major breach" of media regulations by failing to disclose that the narrator of a documentary about the Gaza situation was the child of a Hamas administrator, as ruled by regulatory body Ofcom.
An probe by Ofcom into the documentary titled Gaza: How to Survive a Warzone has determined that the film was "materially misleading".
The head of the BBC had earlier expressed regret, noting there had been "a significant failing in relation to factual correctness".
The regulator has instructed the BBC to transmit a evening declaration about its findings.
"Given this constitutes a significant violation of our code, we are instructing the corporation to broadcast a announcement of our determinations against it on BBC2 at 21:00, with a schedule to be determined," the statement read.
'Risk to Damage Credibility'
The watchdog's report said: "The inquiry we conducted concluded that the film's failure to disclose that the presenter's male guardian held a position in the Hamas-administered authority was significantly deceptive.
"It meant that the viewers did not have vital facts which may have been extremely pertinent to their judgment of the voice and the details he shared.
"Trust is at the heart of the connection between a television network and its viewers, notably for a state-funded media outlet such as the public broadcaster.
"This error had the potential to undermine the exceptionally strong amounts of trust that audiences would have invested in a BBC factual programme about the Israel-Gaza war."
The documentary was removed from iPlayer in the month of February after the presenter's familial connections were revealed, and in this past July an internal BBC review concluded it violated the organization's editorial guidelines on accuracy.
A BBC spokesperson said: "The regulator's decision is in line with the results of Peter Johnston's review, that there was a serious error in the documentary in relation to the corporation's content standards on factual correctness, which corresponds to Rule 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we comply with Ofcom's decision in full. We will follow the directive as soon as the date and wording are finalised."
