The British broadcaster committed a "serious breach" of media regulations by omitting to mention that the voice of a film about the Gaza conflict was the son of a Hamas official, as ruled by UK media regulator Ofcom.
An inquiry by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has determined that the film was "materially misleading".
The head of the BBC had earlier expressed regret, noting there had been "a significant failing in relation to accuracy".
The regulator has instructed the corporation to broadcast a prime-time declaration about its findings.
"Since this amounts to a major infringement of our rules, we are instructing the broadcaster to transmit a announcement of our findings against it on BBC2 at 21:00, with a schedule to be determined," the statement read.
'Possibility to Damage Trust'
The regulator's announcement stated: "The inquiry we conducted concluded that the documentary's failure to disclose that the narrator's parent occupied a role in the Hamas-administered authority was significantly deceptive.
"Consequently that the viewers did not have critical information which may have been extremely pertinent to their assessment of the voice and the content he provided.
"Credibility is at the center of the relationship between a broadcaster and its viewers, particularly for a national broadcasting corporation such as the public broadcaster.
"This error had the possibility to damage the exceptionally strong levels of credibility that viewers would have put in a BBC factual programme about the Gaza conflict."
The programme was withdrawn from the BBC's streaming service in last February after the presenter's personal associations came to light, and in this past July an broadcaster's internal assessment found it breached the corporation's journalistic standards on truthfulness.
A corporation official said: "The authority's determination is in accordance with the results of the internal assessment, that there was a serious error in the programme in relation to the corporation's content standards on truthfulness, which reflects clause 2.2 of the regulator's media standards.
"We expressed regret for this and we accept Ofcom's decision in full. We will follow the penalty as soon as the schedule and wording are finalised."
