The British broadcaster engaged in 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 representative, as ruled by UK media regulator Ofcom.
An inquiry by the broadcasting watchdog into Gaza: How to Survive a Warzone has determined that the documentary was "materially misleading".
The BBC's director general had already issued an apology, saying there had been "a significant failing in relation to truthfulness".
The regulator has directed the BBC to broadcast a prime-time announcement about its findings.
"Given this constitutes a serious breach of our regulations, we are ordering the BBC to transmit a statement of our findings against it on BBC Two at 9pm, with a schedule to be determined," the regulator stated.
'Potential to Damage Trust'
The watchdog's statement stated: "The inquiry we conducted found that the film's omission to reveal that the voice's parent occupied a role in the Hamas-controlled authority was substantially inaccurate.
"Consequently that the public did not have essential details which may have been highly relevant to their judgment of the voice and the information he provided.
"Confidence is at the heart of the bond between a broadcaster and its public, notably for a national broadcasting corporation such as the public broadcaster.
"This oversight had the risk to erode the very considerable amounts of trust that audiences would have put in a BBC factual programme about the Gaza conflict."
The film was pulled from iPlayer in the month of February after the narrator's family links came to light, and in the month of July an corporation's own inquiry found it violated the broadcaster's journalistic standards on truthfulness.
A corporation official commented: "The Ofcom ruling is in agreement with the findings of the internal assessment, that there was a serious error in the documentary in relation to the BBC's Editorial Guidelines on factual correctness, which reflects regulation 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we comply with the regulator's ruling in its entirety. We will adhere to the sanction as soon as the timing and language are confirmed."
