The British broadcaster was found to have committed a "significant breach" of broadcasting rules by failing to disclose that the presenter of a programme about Gaza was the child of a Hamas representative, according to British broadcasting authority Ofcom.
An investigation by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has determined that the documentary was "significantly deceptive".
The BBC's director general had already issued an apology, saying there had been "a major oversight in relation to factual correctness".
Ofcom has instructed the broadcaster to transmit a evening statement about its findings.
"As this represents a serious breach of our regulations, we are directing the broadcaster to broadcast a statement of our findings against it on BBC Two at 9pm, with a schedule to be confirmed," the statement read.
'Possibility to Erode Trust'
The authority's announcement stated: "The inquiry we conducted found that the programme's lack of disclosure that the voice's father occupied a position in the Hamas-administered authority was materially misleading.
"This implied that the public did not have vital facts which may have been highly relevant to their judgment of the voice and the details he provided.
"Confidence is at the core of the bond between a television network and its public, especially for a public service broadcaster such as the BBC.
"This oversight had the potential to damage the very considerable levels of trust that viewers would have put in a BBC factual programme about the Israel-Gaza war."
The programme was withdrawn from iPlayer in February after the presenter's personal associations were revealed, and in July an corporation's own inquiry found it infringed the corporation's content policies on factual correctness.
A BBC spokesperson commented: "The authority's determination is in agreement with the results of Peter Johnston's review, that there was a significant failing in the programme in relation to the broadcaster's journalistic policies on factual correctness, which corresponds to regulation 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we comply with the regulator's ruling in complete. We will comply with the penalty as soon as the timing and wording are confirmed."
