The British broadcaster engaged in a "significant breach" of media regulations by failing to disclose that the voice of a programme about the Gaza situation was the son of a Hamas administrator, as ruled by regulatory body Ofcom.
An investigation by the media regulator into Gaza: How to Survive a Warzone has found that the documentary was "substantially inaccurate".
The head of the BBC had previously apologised, saying there had been "a major oversight in relation to truthfulness".
Ofcom has directed the corporation to transmit a prime-time declaration about its findings.
"Given this constitutes a serious breach of our regulations, we are instructing the BBC to air a statement of our findings against it on BBC2 at 9pm, with a schedule to be finalised," the regulator stated.
'Possibility to Undermine Credibility'
The watchdog's statement said: "Our investigation found that the film's failure to disclose that the presenter's male guardian held a position in the Hamas-controlled authority was substantially inaccurate.
"It meant that the public did not have essential details which may have been very significant to their judgment of the presenter and the details he shared.
"Trust is at the center of the relationship between a media organization and its viewers, notably for a public service broadcaster such as the British Broadcasting Corporation.
"This failing had the possibility to erode the significantly high amounts of credibility that viewers would have invested in a factual film from the broadcaster about the conflict in Gaza."
The programme was withdrawn from the online platform in the month of February after the presenter's family links emerged, and in July an broadcaster's internal assessment determined it breached the organization's journalistic standards on truthfulness.
A representative for the broadcaster commented: "The authority's determination is in accordance with the findings of the corporation's inquiry, that there was a serious error in the film in relation to the broadcaster's journalistic policies on factual correctness, which aligns with Rule 2.2 of the regulator's media standards.
"We have apologised for this and we accept the regulator's ruling in complete. We will comply with the directive as soon as the date and language are determined."
