The British broadcaster was found to have committed a "serious breach" of media regulations by omitting to mention that the narrator of a documentary about the Gaza situation was the son of a Hamas representative, according to British broadcasting authority Ofcom.
An probe by the broadcasting watchdog into Gaza: How to Survive a Warzone has concluded that the documentary was "materially misleading".
The BBC's director general had previously apologised, noting there had been "a significant failing in relation to accuracy".
The authority has instructed the corporation to broadcast a prime-time statement about its decisions.
"Since this amounts to a significant violation of our regulations, we are directing the broadcaster to broadcast a message of our findings against it on BBC2 at 21:00, with a schedule to be determined," the statement read.
'Possibility to Erode Confidence'
The regulator's announcement stated: "Our probe found that the documentary's lack of disclosure that the narrator's father served in a role in the Hamas-controlled authority was substantially inaccurate.
"This implied that the audience did not have vital facts which may have been highly relevant to their judgment of the presenter and the information he shared.
"Trust is at the core of the relationship between a television network and its public, especially for a national broadcasting corporation such as the BBC.
"This failing had the potential to damage the significantly high levels of credibility that the public would have put in a BBC factual programme about the Gaza conflict."
The film was removed from iPlayer in February after the presenter's familial connections emerged, and in July an broadcaster's internal assessment determined it violated the broadcaster's content policies on factual correctness.
A corporation official said: "The authority's determination is in accordance with the conclusions of Peter Johnston's review, that there was a serious error in the programme in relation to the BBC's Editorial Guidelines on accuracy, which reflects regulation 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept Ofcom's decision in complete. We will adhere to the penalty as soon as the timing and wording are finalised."
