The public service broadcaster was found to have committed a "serious breach" of media regulations by omitting to mention that the narrator of a documentary about the Gaza situation was the offspring of a Hamas official, according to British broadcasting authority Ofcom.
An probe by the broadcasting watchdog into Gaza: How to Survive a Warzone has determined that the programme was "substantially inaccurate".
The BBC's director general had previously apologised, noting there had been "a serious error in relation to truthfulness".
The authority has directed the corporation to transmit a peak-time announcement about its conclusions.
"Given this constitutes a major infringement of our code, we are directing the broadcaster to broadcast a announcement of our findings against it on BBC Two at nine o'clock in the evening, with a schedule to be determined," the statement read.
'Potential to Undermine Confidence'
The watchdog's report stated: "Our investigation concluded that the programme's lack of disclosure that the narrator's parent occupied a position in the Hamas-administered administration was significantly deceptive.
"Consequently that the viewers did not have essential details which may have been extremely pertinent to their assessment of the presenter and the content he shared.
"Confidence is at the heart of the relationship between a television network and its viewers, notably for a public service broadcaster such as the BBC.
"This failing had the possibility to undermine the very considerable degrees of trust that audiences would have put in a BBC factual programme about the Gaza conflict."
The programme was withdrawn from iPlayer in the month of February after the narrator's familial connections emerged, and in July an broadcaster's internal assessment found it violated the organization's content policies on accuracy.
A corporation official commented: "The Ofcom ruling is in line with the findings of the internal assessment, that there was a major oversight in the film in relation to the BBC's Editorial Guidelines on accuracy, which reflects clause 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we comply with Ofcom's decision in its entirety. We will follow the penalty as soon as the date and wording are confirmed."
