The British broadcaster was found to have committed a "major breach" of broadcasting rules by failing to disclose that the presenter of a documentary about Gaza was the offspring of a Hamas administrator, according to British broadcasting authority Ofcom.
An inquiry by the broadcasting watchdog into Gaza: How to Survive a Warzone has concluded that the programme was "significantly deceptive".
The chief executive of the broadcaster had earlier expressed regret, saying there had been "a serious error in relation to factual correctness".
Ofcom has directed the corporation to transmit a evening announcement about its findings.
"As this represents a significant violation of our rules, we are instructing the BBC to transmit a announcement of our findings against it on BBC Two at 9pm, with a date to be confirmed," it said.
'Possibility to Damage Confidence'
The regulator's report stated: "Our investigation concluded that the documentary's omission to reveal that the voice's father occupied a role in the Hamas-run government was materially misleading.
"This implied that the viewers did not have essential details which may have been very significant to their judgment of the presenter and the content he shared.
"Credibility is at the core of the bond between a media organization and its audience, notably for a state-funded media outlet such as the BBC.
"This failing had the possibility to erode the significantly high levels of credibility that the public would have invested in a BBC factual programme about the Gaza conflict."
The documentary was removed from the BBC's streaming service in February after the presenter's familial connections were revealed, and in July an broadcaster's internal assessment concluded it violated the organization's journalistic standards on factual correctness.
A BBC spokesperson stated: "The authority's determination is in line with the findings of Peter Johnston's review, that there was a serious error in the film in relation to the corporation's content standards on accuracy, which aligns with Rule 2.2 of the regulator's media standards.
"We issued an apology for this and we comply with Ofcom's decision in full. We will adhere to the directive as soon as the timing and wording are confirmed."
