The British broadcaster committed a "significant breach" of media regulations by failing to disclose that the voice of a documentary about the Gaza situation was the child of a Hamas official, as determined by British broadcasting authority Ofcom.
An probe by the media regulator into the documentary titled Gaza: How to Survive a Warzone has found that the film was "significantly deceptive".
The BBC's director general had previously apologised, noting there had been "a major oversight in relation to accuracy".
Ofcom has instructed the broadcaster to transmit a prime-time announcement about its conclusions.
"As this represents a serious breach of our code, we are directing the broadcaster to broadcast a statement of our conclusions against it on the BBC's second channel at nine o'clock in the evening, with a date to be determined," the statement read.
'Risk to Damage Credibility'
The watchdog's statement declared: "Our investigation found that the programme's failure to disclose that the presenter's father held a role in the Hamas-run administration was materially misleading.
"Consequently that the audience did not have vital facts which may have been extremely pertinent to their evaluation of the voice and the details he shared.
"Credibility is at the core of the bond between a broadcaster and its audience, especially for a national broadcasting corporation such as the British Broadcasting Corporation.
"This error had the possibility to damage the very considerable amounts of trust that the public would have placed in a BBC factual programme about the conflict in Gaza."
The film was pulled from the BBC's streaming service in last February after the narrator's family links emerged, and in this past July an corporation's own inquiry concluded it violated the corporation's content policies on truthfulness.
A BBC spokesperson stated: "The Ofcom ruling is in agreement with the conclusions of Peter Johnston's review, that there was a significant failing in the programme in relation to the corporation's content standards on accuracy, which reflects regulation 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we agree with the authority's determination in full. We will follow the penalty as soon as the date and language are finalised."
