The public service broadcaster was found to have committed a "major breach" of broadcasting rules by failing to disclose that the voice of a film about Gaza was the child of a Hamas official, as determined by regulatory body Ofcom.
An probe by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has determined that the film was "significantly deceptive".
The BBC's director general had already issued an apology, stating there had been "a significant failing in relation to accuracy".
Ofcom has instructed the broadcaster to air a prime-time declaration about its conclusions.
"Given this constitutes a serious breach of our regulations, we are ordering the corporation to transmit a announcement of our conclusions against it on the BBC's second channel at 9pm, with a date to be confirmed," it said.
'Risk to Undermine Trust'
The watchdog's report said: "Our probe concluded that the film's omission to reveal that the voice's parent occupied a position in the Hamas-run government was substantially inaccurate.
"Consequently that the public did not have critical information which may have been highly relevant to their judgment of the voice and the content he presented.
"Credibility is at the heart of the connection between a media organization and its viewers, notably for a state-funded media outlet such as the BBC.
"This failing had the risk to damage the very considerable amounts of trust that audiences would have placed in a BBC factual programme about the conflict in Gaza."
The film was removed from the online platform in last February after the presenter's family links were revealed, and in this past July an corporation's own inquiry found it breached the corporation's content policies on factual correctness.
A BBC spokesperson commented: "The Ofcom ruling is in accordance with the findings of the internal assessment, that there was a major oversight in the programme in relation to the broadcaster's journalistic policies on factual correctness, 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 follow the penalty as soon as the schedule and wording are determined."
