The public service broadcaster engaged in a "significant breach" of broadcasting rules by omitting to mention that the narrator of a documentary about the Gaza situation was the son of a Hamas administrator, as determined by UK media regulator Ofcom.
An investigation by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the programme was "materially misleading".
The BBC's director general had already issued an apology, stating there had been "a significant failing in relation to truthfulness".
The regulator has instructed the broadcaster to transmit a prime-time announcement about its conclusions.
"Since this amounts to a major infringement of our regulations, we are ordering the BBC to air a announcement of our determinations against it on the BBC's second channel at 9pm, with a date to be confirmed," the statement read.
'Potential to Erode Credibility'
The regulator's report said: "Our investigation concluded that the programme's omission to reveal that the narrator's father occupied a position in the Hamas-controlled authority was significantly deceptive.
"This implied 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 core of the connection between a television network and its viewers, particularly for a public service broadcaster such as the public broadcaster.
"This error had the risk to damage the exceptionally strong levels of credibility that viewers would have put in a documentary produced by the BBC about the Israel-Gaza war."
The film was withdrawn from the online platform in the month of February after the presenter's familial connections were revealed, and in this past July an broadcaster's internal assessment determined it breached the corporation's journalistic standards on factual correctness.
A representative for the broadcaster stated: "The authority's determination is in agreement with the conclusions of Peter Johnston's review, that there was a major oversight in the film in relation to the BBC's Editorial Guidelines on truthfulness, which aligns with Rule 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we accept Ofcom's decision in complete. We will comply with the penalty as soon as the date and wording are confirmed."
