The BBC was found to have committed a "significant breach" of broadcasting rules by not revealing that the voice of a documentary about Gaza was the child of a Hamas official, as determined by regulatory body Ofcom.
An probe by the media regulator into the documentary titled Gaza: How to Survive a Warzone has found that the film was "significantly deceptive".
The BBC's director general had previously apologised, noting there had been "a serious error in relation to accuracy".
The authority has instructed the corporation to broadcast a evening statement about its conclusions.
"Given this constitutes a significant violation of our code, we are ordering the corporation to broadcast a statement of our findings against it on BBC Two at 21:00, with a timing to be finalised," the statement read.
'Potential to Undermine Confidence'
The authority's report said: "Our probe determined that the programme's omission to reveal that the presenter's father occupied a post in the Hamas-run government was materially misleading.
"Consequently that the audience did not have vital facts which may have been very significant to their assessment of the narrator and the details he presented.
"Confidence is at the core of the relationship between a broadcaster and its audience, particularly for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the potential to undermine the very considerable amounts of credibility that viewers would have put in a BBC factual programme about the conflict in Gaza."
The film was withdrawn from iPlayer in the month of February after the narrator's family links came to light, and in the month of July an internal BBC review found it violated the organization's content policies on accuracy.
A BBC spokesperson commented: "The regulator's decision is in line with the findings of the internal assessment, that there was a significant failing in the film in relation to the broadcaster's journalistic policies on accuracy, which reflects regulation 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we comply with Ofcom's decision in complete. We will follow the penalty as soon as the timing and wording are confirmed."
