The BBC engaged in a "significant breach" of industry standards by not revealing that the voice of a film about Gaza was the son of a Hamas representative, according to UK media regulator Ofcom.
An investigation by Ofcom into Gaza: How to Survive a Warzone has determined that the documentary was "significantly deceptive".
The chief executive of the broadcaster had earlier expressed regret, noting there had been "a major oversight in relation to accuracy".
The authority has directed the BBC to transmit a evening statement about its findings.
"Given this constitutes a serious breach of our code, we are directing the broadcaster to transmit a statement of our findings against it on BBC2 at 9pm, with a timing to be finalised," the statement read.
'Potential to Damage Confidence'
The watchdog's report said: "The inquiry we conducted concluded that the film's omission to reveal that the voice's father served in a post in the Hamas-controlled administration was materially misleading.
"This implied that the public did not have vital facts which may have been highly relevant to their assessment of the presenter and the information he presented.
"Credibility is at the core of the bond between a broadcaster and its audience, particularly for a national broadcasting corporation such as the British Broadcasting Corporation.
"This oversight had the possibility to undermine the significantly high levels of credibility that audiences would have placed in a BBC factual programme about the Israel-Gaza war."
The programme was pulled from iPlayer in the month of February after the narrator's familial connections emerged, and in the month of July an corporation's own inquiry determined it infringed the organization's content policies on truthfulness.
A corporation official said: "The regulator's decision is in line with the results of Peter Johnston's review, that there was a significant failing in the programme in relation to the broadcaster's journalistic policies on accuracy, which reflects Rule 2.2 of the regulator's media standards.
"We issued an apology for this and we agree with the authority's determination in its entirety. We will comply with the directive as soon as the schedule and language are confirmed."
