The British broadcaster committed a "significant breach" of broadcasting rules by omitting to mention that the narrator of a film about the Gaza conflict was the offspring of a Hamas representative, as ruled by UK media regulator Ofcom.
An investigation by the media regulator into the documentary titled Gaza: How to Survive a Warzone has concluded that the film was "materially misleading".
The BBC's director general had previously apologised, stating there had been "a major oversight in relation to accuracy".
The authority has ordered the BBC to transmit a prime-time announcement about its conclusions.
"Given this constitutes a serious breach of our code, we are directing the broadcaster to transmit a statement of our conclusions against it on BBC2 at 9pm, with a schedule to be finalised," the statement read.
'Possibility to Damage Credibility'
The regulator's statement stated: "The inquiry we conducted found that the film's lack of disclosure that the presenter's parent served in a post in the Hamas-run administration was significantly deceptive.
"Consequently that the audience did not have essential details which may have been highly relevant to their judgment of the presenter and the content he shared.
"Confidence is at the core of the bond between a television network and its audience, notably for a state-funded media outlet such as the public broadcaster.
"This error had the risk to damage the exceptionally strong amounts of credibility that audiences would have placed in a factual film from the broadcaster about the Gaza conflict."
The documentary was withdrawn from iPlayer in the month of February after the presenter's familial connections emerged, and in this past July an corporation's own inquiry concluded it infringed the broadcaster's editorial guidelines on truthfulness.
A representative for the broadcaster said: "The Ofcom ruling is in line with the conclusions of the internal assessment, that there was a serious error in the documentary in relation to the BBC's Editorial Guidelines on factual correctness, which reflects Rule 2.2 of the regulator's media standards.
"We issued an apology for this and we accept the regulator's ruling in complete. We will adhere to the penalty as soon as the timing and language are confirmed."