The British broadcaster was found to have committed a "significant breach" of industry standards by not revealing that the narrator of a film about the Gaza situation was the son of a Hamas official, as ruled by UK media regulator Ofcom.
An inquiry by the broadcasting watchdog into Gaza: How to Survive a Warzone has concluded that the documentary was "materially misleading".
The chief executive of the broadcaster had earlier expressed regret, noting there had been "a serious error in relation to factual correctness".
The authority has instructed the corporation to air a peak-time announcement about its decisions.
"Given this constitutes a major infringement of our rules, we are ordering the corporation to transmit a statement of our findings against it on BBC Two at 9pm, with a schedule to be finalised," the statement read.
'Risk to Damage Credibility'
The authority's statement declared: "Our investigation determined that the film's omission to reveal that the presenter's male guardian held a position in the Hamas-run authority was materially misleading.
"It meant that the audience did not have critical information which may have been very significant to their assessment of the voice and the content he presented.
"Credibility is at the heart of the relationship between a media organization and its audience, particularly for a state-funded media outlet such as the public broadcaster.
"This error had the potential to undermine the very considerable degrees of confidence that audiences would have placed in a BBC factual programme about the Gaza conflict."
The documentary was pulled from iPlayer in the month of February after the boy's personal associations were revealed, and in July an broadcaster's internal assessment concluded it infringed the corporation's content policies on truthfulness.
A corporation official commented: "The Ofcom ruling is in line with the findings of the corporation's inquiry, that there was a significant failing in the programme in relation to the BBC's Editorial Guidelines on accuracy, which corresponds to clause 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we agree with Ofcom's decision in its entirety. We will follow the penalty as soon as the date and wording are determined."
