The BBC committed a "serious breach" of media regulations by failing to disclose that the presenter of a documentary about Gaza was the son of a Hamas representative, as determined by UK media regulator Ofcom.
An investigation by the media regulator into the programme Gaza: How to Survive a Warzone has determined that the film was "substantially inaccurate".
The chief executive of the broadcaster had previously apologised, saying there had been "a significant failing in relation to factual correctness".
Ofcom has instructed the corporation to broadcast a evening declaration about its decisions.
"Given this constitutes a significant violation of our rules, we are ordering the BBC to air a announcement of our conclusions against it on BBC2 at 21:00, with a timing to be finalised," the statement read.
'Potential to Damage Trust'
The regulator's announcement said: "Our probe found that the film's omission to reveal that the voice's father served in a role in the Hamas-run administration was substantially inaccurate.
"This implied that the audience did not have critical information which may have been extremely pertinent to their judgment of the presenter 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 public broadcaster.
"This error had the potential to undermine the significantly high amounts of trust that audiences would have put in a documentary produced by the BBC about the Israel-Gaza war."
The programme was pulled from the BBC's streaming service in the month of February after the boy's personal associations emerged, and in July an internal BBC review concluded it infringed the broadcaster's journalistic standards on factual correctness.
A representative for the broadcaster said: "The authority's determination is in line with the conclusions of the internal assessment, that there was a significant failing in the programme in relation to the BBC's Editorial Guidelines on factual correctness, which aligns with Rule 2.2 of the regulator's media standards.
"We have apologised for this and we comply with the authority's determination in its entirety. We will comply with the sanction as soon as the date and wording are confirmed."
