The public service broadcaster committed a "significant breach" of broadcasting rules by failing to disclose that the presenter of a documentary about Gaza was the child of a Hamas official, according to regulatory body Ofcom.
An investigation by Ofcom into the documentary titled Gaza: How to Survive a Warzone has determined that the film was "materially misleading".
The BBC's director general had previously apologised, saying there had been "a significant failing in relation to factual correctness".
The regulator has instructed the corporation to air a peak-time declaration about its findings.
"As this represents a major infringement of our rules, we are ordering the broadcaster to broadcast a announcement of our determinations against it on the BBC's second channel at nine o'clock in the evening, with a schedule to be finalised," the statement read.
'Potential to Erode Trust'
The regulator's announcement stated: "Our probe determined that the programme's omission to reveal that the voice's male guardian served in a role in the Hamas-run government was significantly deceptive.
"This implied that the viewers did not have vital facts which may have been highly relevant to their evaluation of the presenter and the content he presented.
"Confidence is at the heart of the bond between a broadcaster and its public, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This error had the risk to damage the very considerable amounts of trust that the public would have placed in a documentary produced by the BBC about the conflict in Gaza."
The film was withdrawn from iPlayer in last February after the presenter's family links emerged, and in the month of July an broadcaster's internal assessment found it violated the broadcaster's content policies on factual correctness.
A BBC spokesperson stated: "The regulator's decision is in accordance with the findings of the corporation's inquiry, that there was a major oversight in the documentary in relation to the corporation's content standards on accuracy, which aligns with Rule 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we agree with the regulator's ruling in its entirety. We will follow the penalty as soon as the schedule and language are determined."
