The British broadcaster was found to have committed a "serious breach" of media regulations by omitting to mention that the narrator of a programme about the Gaza conflict was the son of a Hamas official, as ruled by UK media regulator Ofcom.
An investigation by the broadcasting watchdog into Gaza: How to Survive a Warzone has determined that the documentary was "materially misleading".
The head of the BBC had earlier expressed regret, saying there had been "a major oversight in relation to factual correctness".
The regulator has ordered the corporation to broadcast a prime-time statement about its findings.
"As this represents a major infringement of our regulations, we are ordering the corporation to transmit a message of our conclusions against it on BBC Two at 9pm, with a timing to be finalised," the regulator stated.
'Risk to Erode Confidence'
The authority's statement said: "The inquiry we conducted determined that the programme's lack of disclosure that the presenter's father occupied a role in the Hamas-run authority was substantially inaccurate.
"It meant that the audience did not have essential details which may have been highly relevant to their assessment of the presenter and the information he shared.
"Trust is at the core of the connection between a television network and its public, particularly for a national broadcasting corporation such as the BBC.
"This oversight had the possibility to undermine the very considerable degrees of confidence that audiences would have placed in a documentary produced by the BBC about the Gaza conflict."
The documentary was pulled from the online platform in the month of February after the narrator's family links emerged, and in this past July an internal BBC review found it violated the corporation's editorial guidelines on factual correctness.
A representative for the broadcaster said: "The regulator's decision is in line with the results of the internal assessment, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on factual correctness, which corresponds to Rule 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we agree with the regulator's ruling in full. We will follow the sanction as soon as the schedule and wording are confirmed."
