The British broadcaster committed a "serious breach" of broadcasting rules by not revealing that the presenter of a documentary about the Gaza conflict was the offspring of a Hamas official, as determined by British broadcasting authority Ofcom.
An probe by the media regulator into Gaza: How to Survive a Warzone has determined that the programme was "materially misleading".
The chief executive of the broadcaster had already issued an apology, saying there had been "a serious error in relation to accuracy".
The authority has directed the broadcaster to transmit a peak-time declaration about its decisions.
"Since this amounts to a serious breach of our rules, we are ordering the broadcaster to transmit a announcement of our findings against it on BBC2 at 21:00, with a schedule to be finalised," it said.
'Potential to Undermine Trust'
The authority's announcement stated: "The inquiry we conducted determined that the programme's omission to reveal that the voice's parent held a role in the Hamas-administered authority was significantly deceptive.
"It meant that the audience did not have essential details which may have been very significant to their judgment of the voice and the details he shared.
"Trust is at the core of the bond between a television network and its public, particularly for a public service broadcaster such as the BBC.
"This failing had the possibility to erode the significantly high levels of trust that audiences would have placed in a BBC factual programme about the Israel-Gaza war."
The film was pulled from the BBC's streaming service in February after the presenter's familial connections emerged, and in July an broadcaster's internal assessment determined it infringed the organization's journalistic standards on factual correctness.
A corporation official commented: "The authority's determination is in line with the conclusions of the internal assessment, that there was a major oversight in the documentary in relation to the corporation's content standards on accuracy, which reflects Rule 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we agree with the regulator's ruling in full. We will follow the sanction as soon as the schedule and language are determined."
