The British broadcaster engaged in a "serious breach" of media regulations by omitting to mention that the narrator of a documentary about the Gaza situation was the offspring of a Hamas representative, as determined by UK media regulator Ofcom.
An inquiry by Ofcom into the programme Gaza: How to Survive a Warzone has found that the film was "significantly deceptive".
The head of the BBC had earlier expressed regret, saying there had been "a serious error in relation to truthfulness".
The authority has instructed the BBC to transmit a prime-time announcement about its decisions.
"Given this constitutes a significant violation of our regulations, we are directing the broadcaster to transmit a message of our conclusions against it on the BBC's second channel at 21:00, with a timing to be determined," the regulator stated.
'Possibility to Undermine Credibility'
The regulator's report said: "The inquiry we conducted found that the film's omission to reveal that the narrator's parent held a position in the Hamas-administered government was materially misleading.
"This implied that the audience did not have vital facts which may have been very significant to their evaluation of the presenter and the details he shared.
"Credibility is at the core of the connection between a media organization and its public, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the risk to undermine the very considerable amounts of trust that audiences would have placed in a factual film from the broadcaster about the Gaza conflict."
The film was pulled from iPlayer in February after the boy's family links came to light, and in this past July an internal BBC review concluded it violated the corporation's journalistic standards on accuracy.
A corporation official commented: "The Ofcom ruling is in line with the results of the internal assessment, that there was a significant failing in the documentary in relation to the broadcaster's journalistic policies on truthfulness, which reflects regulation 2.2 of the regulator's media standards.
"We have apologised for this and we agree with the regulator's ruling in full. We will adhere to the sanction as soon as the schedule and language are finalised."
