The British broadcaster engaged in a "major breach" of broadcasting rules by failing to disclose that the voice of a documentary about Gaza was the child of a Hamas representative, according to regulatory body Ofcom.
An investigation by the media regulator into Gaza: How to Survive a Warzone has found that the film was "significantly deceptive".
The BBC's director general had earlier expressed regret, stating there had been "a major oversight in relation to accuracy".
The regulator has instructed the BBC to broadcast a peak-time statement about its findings.
"As this represents a significant violation of our regulations, we are directing the corporation to broadcast a announcement of our findings against it on BBC Two at 9pm, with a date to be confirmed," it said.
'Potential to Undermine Credibility'
The regulator's statement declared: "Our investigation concluded that the programme's omission to reveal that the presenter's father held a post in the Hamas-controlled authority was significantly deceptive.
"Consequently that the public did not have vital facts which may have been highly relevant to their assessment of the voice and the details he provided.
"Credibility is at the heart of the relationship between a television network and its audience, particularly for a state-funded media outlet such as the BBC.
"This oversight had the possibility to damage the significantly high levels of trust that audiences would have put in a BBC factual programme about the conflict in Gaza."
The programme was pulled from the BBC's streaming service in the month of February after the presenter's familial connections emerged, and in this past July an internal BBC review determined it infringed the broadcaster's editorial guidelines on truthfulness.
A BBC spokesperson stated: "The Ofcom ruling is in line with the findings of the corporation's inquiry, that there was a significant failing in the programme in relation to the broadcaster's journalistic policies on factual correctness, which reflects clause 2.2 of the regulator's media standards.
"We issued an apology for this and we comply with Ofcom's decision in complete. We will adhere to the directive as soon as the timing and wording are confirmed."
