The public service broadcaster committed a "major breach" of industry standards by failing to disclose that the presenter of a documentary about Gaza was the son of a Hamas official, according to regulatory body Ofcom.
An inquiry by the broadcasting watchdog into Gaza: How to Survive a Warzone has determined that the documentary was "materially misleading".
The chief executive of the broadcaster had previously apologised, stating there had been "a serious error in relation to factual correctness".
The authority has ordered the broadcaster to transmit a peak-time declaration about its decisions.
"As this represents a serious breach of our rules, we are directing the corporation to transmit a statement of our determinations against it on BBC Two at 9pm, with a date to be confirmed," the statement read.
'Risk to Undermine Credibility'
The regulator's report stated: "Our investigation found that the film's lack of disclosure that the presenter's male guardian occupied a position in the Hamas-run administration was significantly deceptive.
"This implied that the public did not have essential details which may have been highly relevant to their judgment of the voice and the content he presented.
"Credibility is at the heart of the bond between a broadcaster and its audience, notably for a national broadcasting corporation such as the British Broadcasting Corporation.
"This error had the possibility to damage the exceptionally strong amounts of trust that viewers would have invested in a documentary produced by the BBC about the Gaza conflict."
The documentary was withdrawn from iPlayer in the month of February after the presenter's family links were revealed, and in this past July an internal BBC review determined it infringed the corporation's content policies on factual correctness.
A BBC spokesperson said: "The regulator's decision is in line with the conclusions of Peter Johnston's review, that there was a serious error in the documentary in relation to the BBC's Editorial Guidelines on truthfulness, which aligns with Rule 2.2 of the regulator's media standards.
"We issued an apology for this and we accept the authority's determination in complete. We will comply with the penalty as soon as the timing and language are confirmed."
