The public service broadcaster committed a "significant breach" of industry standards by not revealing that the presenter of a programme about the Gaza situation was the son of a Hamas administrator, as determined by UK media regulator Ofcom.
An investigation by Ofcom into Gaza: How to Survive a Warzone has determined that the programme 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 directed the corporation to broadcast a peak-time declaration about its conclusions.
"As this represents a major infringement of our code, we are directing the BBC to transmit a message of our findings against it on BBC2 at nine o'clock in the evening, with a date to be confirmed," the statement read.
'Risk to Erode Trust'
The authority's announcement said: "Our probe determined that the programme's lack of disclosure that the voice's male guardian held a post in the Hamas-administered authority was substantially inaccurate.
"This implied that the audience did not have vital facts which may have been extremely pertinent to their judgment of the voice and the details he shared.
"Trust is at the core of the connection between a media organization and its viewers, especially for a national broadcasting corporation such as the BBC.
"This failing had the risk to damage the very considerable levels of confidence that viewers would have invested in a documentary produced by the BBC about the Gaza conflict."
The film was removed from the online platform in the month of February after the presenter's personal associations emerged, and in this past July an internal BBC review determined it violated the broadcaster's content policies on factual correctness.
A BBC spokesperson commented: "The regulator's decision is in accordance with the conclusions of Peter Johnston's review, that there was a serious error in the film in relation to the BBC's Editorial Guidelines on truthfulness, which aligns with regulation 2.2 of the regulator's media standards.
"We have apologised for this and we accept the authority's determination in its entirety. We will adhere to the directive as soon as the timing and wording are determined."
