The British broadcaster committed a "major breach" of broadcasting rules by not revealing that the voice of a film about the Gaza situation was the offspring of a Hamas administrator, as determined by UK media regulator Ofcom.
An investigation by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the programme was "materially misleading".
The head of the BBC had earlier expressed regret, stating there had been "a significant failing in relation to factual correctness".
Ofcom has directed the corporation to broadcast a prime-time statement about its findings.
"Since this amounts to a serious breach of our regulations, we are instructing the BBC to transmit a announcement of our findings against it on BBC2 at 9pm, with a schedule to be confirmed," the regulator stated.
'Potential to Undermine Confidence'
The authority's report stated: "Our investigation determined that the documentary's lack of disclosure that the narrator's parent served in a role in the Hamas-administered authority was substantially inaccurate.
"This implied that the public did not have essential details which may have been extremely pertinent to their assessment of the narrator and the content he provided.
"Trust is at the heart of the connection between a television network and its public, notably for a national broadcasting corporation such as the public broadcaster.
"This failing had the possibility to damage the exceptionally strong levels of confidence that the public would have put in a BBC factual programme about the Gaza conflict."
The documentary was withdrawn from the online platform in February after the presenter's personal associations emerged, and in July an internal BBC review concluded it violated the corporation's journalistic standards on truthfulness.
A BBC spokesperson said: "The Ofcom ruling is in accordance with the conclusions of the internal assessment, that there was a major oversight in the film in relation to the corporation's content standards on factual correctness, which reflects clause 2.2 of the regulator's media standards.
"We have apologised for this and we agree with the regulator's ruling in complete. We will follow the penalty as soon as the schedule and language are finalised."
