The British broadcaster engaged in a "significant breach" of media regulations by not revealing that the presenter of a documentary about Gaza was the offspring of a Hamas representative, as ruled by regulatory body Ofcom.
An investigation by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has concluded that the programme was "substantially inaccurate".
The BBC's director general had previously apologised, noting there had been "a major oversight in relation to truthfulness".
Ofcom has ordered the broadcaster to air a peak-time announcement about its decisions.
"Given this constitutes a major infringement of our rules, we are instructing the corporation to broadcast a message of our determinations against it on the BBC's second channel at nine o'clock in the evening, with a timing to be determined," the regulator stated.
'Potential to Damage Trust'
The authority's statement stated: "Our investigation found that the programme's lack of disclosure that the voice's father occupied a position in the Hamas-administered administration was substantially inaccurate.
"It meant that the audience did not have essential details which may have been highly relevant to their judgment of the narrator and the details he presented.
"Confidence is at the core of the connection between a broadcaster and its public, notably for a public service broadcaster such as the British Broadcasting Corporation.
"This failing had the risk to erode the very considerable degrees of confidence that audiences would have invested in a documentary produced by the BBC about the conflict in Gaza."
The documentary was pulled from iPlayer in last February after the presenter's family links were revealed, and in the month of July an internal BBC review concluded it infringed the organization's editorial guidelines on truthfulness.
A corporation official said: "The authority's determination is in agreement with the conclusions of the internal assessment, that there was a serious error in the film in relation to the BBC's Editorial Guidelines on accuracy, which corresponds to clause 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we agree with the regulator's ruling in full. We will follow the penalty as soon as the timing and wording are finalised."
