The public service broadcaster committed a "serious breach" of industry standards by failing to disclose that the narrator of a programme about the Gaza situation was the child of a Hamas representative, as ruled by UK media regulator Ofcom.
An investigation by the media regulator into the programme Gaza: How to Survive a Warzone has found that the documentary was "materially misleading".
The chief executive of the broadcaster had already issued an apology, saying there had been "a serious error in relation to factual correctness".
The regulator has instructed the corporation to air a prime-time declaration about its findings.
"Given this constitutes a major infringement of our code, we are instructing the broadcaster to transmit a announcement of our determinations against it on BBC Two at 21:00, with a date to be finalised," the statement read.
'Potential to Erode Credibility'
The watchdog's report declared: "Our investigation found that the programme's lack of disclosure that the presenter's male guardian occupied a role in the Hamas-controlled authority was significantly deceptive.
"Consequently that the viewers did not have critical information which may have been highly relevant to their assessment of the voice and the details he presented.
"Confidence is at the heart of the relationship between a broadcaster and its public, notably for a national broadcasting corporation such as the British Broadcasting Corporation.
"This failing had the possibility to erode the very considerable amounts of credibility that the public would have put in a documentary produced by the BBC about the Gaza conflict."
The documentary was pulled from iPlayer in the month of February after the narrator's familial connections came to light, and in the month of July an internal BBC review concluded it infringed the broadcaster's journalistic standards on factual correctness.
A representative for the broadcaster stated: "The regulator's decision is in line with the results of the corporation's inquiry, that there was a major oversight in the programme in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to clause 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept the regulator's ruling in its entirety. We will follow the sanction as soon as the schedule and language are finalised."
