The BBC engaged in a "serious breach" of industry standards by not revealing that the presenter of a film about Gaza was the child of a Hamas official, as determined by UK media regulator Ofcom.
An investigation by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has determined that the programme was "materially misleading".
The BBC's director general had already issued an apology, stating there had been "a serious error in relation to factual correctness".
The regulator has ordered the corporation to air a prime-time statement about its findings.
"Given this constitutes a major infringement of our regulations, we are directing the corporation to transmit a statement of our determinations against it on BBC Two at 21:00, with a timing to be determined," the regulator stated.
'Risk to Erode Trust'
The authority's announcement said: "The inquiry we conducted concluded that the documentary's failure to disclose that the voice's parent occupied a post in the Hamas-administered government was significantly deceptive.
"It meant that the public did not have vital facts which may have been highly relevant to their assessment of the voice and the details he shared.
"Credibility is at the core of the connection between a television network and its public, notably for a public service broadcaster such as the BBC.
"This error had the potential to damage the exceptionally strong levels of trust that viewers would have put in a BBC factual programme about the conflict in Gaza."
The programme was pulled from the BBC's streaming service in last February after the narrator's personal associations were revealed, and in the month of July an corporation's own inquiry found it violated the corporation's journalistic standards on truthfulness.
A BBC spokesperson commented: "The authority's determination is in agreement with the findings of the corporation's inquiry, that there was a major oversight in the programme in relation to the BBC's Editorial Guidelines on accuracy, which aligns with Rule 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we comply with the authority's determination in full. We will follow the directive as soon as the date and wording are finalised."
