The public service broadcaster committed a "serious breach" of industry standards by failing to disclose that the narrator of a film about the Gaza situation was the offspring of a Hamas representative, as determined by British broadcasting authority Ofcom.
An probe by the broadcasting watchdog into Gaza: How to Survive a Warzone has found that the documentary was "materially misleading".
The head of the BBC had previously apologised, saying there had been "a major oversight in relation to factual correctness".
The regulator has instructed the corporation to transmit a prime-time statement about its decisions.
"Since this amounts to a serious breach of our code, we are directing the broadcaster to transmit a message of our findings against it on the BBC's second channel at 21:00, with a schedule to be determined," it said.
'Risk to Undermine Confidence'
The watchdog's report said: "Our probe found that the documentary's failure to disclose that the narrator's parent occupied a role in the Hamas-run government was significantly deceptive.
"Consequently that the public did not have essential details which may have been extremely pertinent to their evaluation of the voice and the information he shared.
"Confidence is at the heart of the relationship 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 degrees of trust that audiences would have placed in a factual film from the broadcaster about the conflict in Gaza."
The programme was pulled from the online platform in the month of February after the narrator's family links emerged, and in the month of July an corporation's own inquiry found it infringed the broadcaster's journalistic standards on truthfulness.
A corporation official commented: "The authority's determination is in line with the findings of the internal assessment, that there was a significant failing in the film in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to regulation 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept the regulator's ruling in complete. We will follow the sanction as soon as the date and wording are finalised."
