The BBC was found to have committed a "significant breach" of media regulations by not revealing that the voice of a programme about Gaza was the son of a Hamas representative, as determined by UK media regulator 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 previously apologised, stating there had been "a major oversight in relation to accuracy".
The authority has directed the broadcaster to transmit a peak-time declaration about its decisions.
"As this represents a significant violation of our code, we are ordering the BBC to transmit a statement of our determinations against it on BBC Two at nine o'clock in the evening, with a timing to be finalised," it said.
'Risk to Damage Credibility'
The watchdog's announcement declared: "The inquiry we conducted determined that the programme's lack of disclosure that the voice's parent occupied a role in the Hamas-controlled authority was substantially inaccurate.
"It meant that the public did not have critical information which may have been highly relevant to their evaluation of the voice and the details he provided.
"Credibility is at the core of the connection between a broadcaster and its audience, especially for a public service broadcaster such as the public broadcaster.
"This oversight had the possibility to erode the very considerable levels of trust that viewers would have put in a factual film from the broadcaster about the conflict in Gaza."
The programme was removed from the online platform in February after the presenter's personal associations came to light, and in July an internal BBC review found it violated the corporation's content policies on factual correctness.
A BBC spokesperson stated: "The authority's determination is in agreement with the conclusions of the corporation's inquiry, that there was a major oversight in the film in relation to the corporation's content standards on factual correctness, which reflects Rule 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we accept the authority's determination in complete. We will follow the penalty as soon as the date and wording are finalised."
