The public service broadcaster was found to have committed a "major breach" of industry standards by not revealing that the voice of a documentary about Gaza was the son of a Hamas representative, as ruled by British broadcasting authority Ofcom.
An inquiry by Ofcom into the documentary titled Gaza: How to Survive a Warzone has determined that the film was "materially misleading".
The head of the BBC had earlier expressed regret, saying there had been "a serious error in relation to truthfulness".
Ofcom has directed the BBC to transmit a evening announcement about its decisions.
"Since this amounts to a serious breach of our code, we are directing the broadcaster to transmit a message of our determinations against it on the BBC's second channel at 21:00, with a schedule to be determined," the regulator stated.
'Potential to Erode Confidence'
The watchdog's announcement declared: "Our probe concluded that the film's lack of disclosure that the presenter's male guardian held a position in the Hamas-controlled government was significantly deceptive.
"This implied that the audience did not have essential details which may have been extremely pertinent to their assessment of the presenter and the details he shared.
"Trust is at the heart of the bond between a broadcaster and its audience, especially for a national broadcasting corporation such as the public broadcaster.
"This error had the possibility to undermine the very considerable degrees of trust that the public would have put in a BBC factual programme about the Gaza conflict."
The documentary was withdrawn from iPlayer in February after the presenter's family links came to light, and in the month of July an internal BBC review found it infringed the organization's journalistic standards on factual correctness.
A corporation official said: "The authority's determination is in accordance with the results of the internal assessment, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on accuracy, which aligns with Rule 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we comply with Ofcom's decision in its entirety. We will comply with the penalty as soon as the date and wording are confirmed."
