The British broadcaster committed a "significant breach" of broadcasting rules by not revealing that the presenter of a documentary about the Gaza situation was the child of a Hamas official, as ruled by UK media regulator Ofcom.
An investigation by Ofcom into Gaza: How to Survive a Warzone has concluded that the film was "significantly deceptive".
The BBC's director general had previously apologised, stating there had been "a significant failing in relation to accuracy".
Ofcom has instructed the corporation to transmit a peak-time declaration about its decisions.
"As this represents a significant violation of our code, we are instructing the BBC to transmit a message of our conclusions against it on BBC2 at 9pm, with a timing to be confirmed," the regulator stated.
'Potential to Erode Confidence'
The watchdog's statement stated: "Our investigation found that the documentary's omission to reveal that the presenter's parent served in a position in the Hamas-run authority was substantially inaccurate.
"It meant that the viewers did not have vital facts which may have been highly relevant to their assessment of the presenter and the information he provided.
"Trust is at the heart of the connection between a television network and its public, especially for a national broadcasting corporation such as the public broadcaster.
"This oversight had the possibility to undermine the exceptionally strong degrees of trust that the public would have put in a documentary produced by the BBC about the Israel-Gaza war."
The programme was pulled from the online platform in the month of February after the presenter's familial connections were revealed, and in this past July an broadcaster's internal assessment determined it breached the organization's editorial guidelines on factual correctness.
A representative for the broadcaster commented: "The authority's determination is in agreement with the conclusions of the corporation's inquiry, that there was a serious error in the film in relation to the BBC's Editorial Guidelines on factual correctness, which aligns with regulation 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we agree with the regulator's ruling in full. We will adhere to the penalty as soon as the date and language are confirmed."