The public service broadcaster was found to have committed a "major breach" of broadcasting rules by not revealing that the narrator of a film about the Gaza situation was the son of a Hamas official, according to British broadcasting authority Ofcom.
An investigation by the broadcasting watchdog into Gaza: How to Survive a Warzone has found that the documentary was "substantially inaccurate".
The head of the BBC had previously apologised, stating there had been "a serious error in relation to factual correctness".
The regulator has directed the corporation to air a peak-time declaration about its decisions.
"Since this amounts to a serious breach of our code, we are ordering the broadcaster to air a statement of our conclusions against it on the BBC's second channel at 21:00, with a schedule to be determined," it said.
'Risk to Undermine Credibility'
The watchdog's statement declared: "Our investigation determined that the film's failure to disclose that the voice's father occupied a position in the Hamas-administered authority was significantly deceptive.
"Consequently that the public did not have vital facts which may have been very significant to their evaluation of the narrator and the content he provided.
"Credibility is at the core of the relationship between a television network and its audience, particularly for a public service broadcaster such as the British Broadcasting Corporation.
"This oversight had the possibility to erode the very considerable levels of credibility that the public would have put in a documentary produced by the BBC about the conflict in Gaza."
The programme was removed from the BBC's streaming service in February after the presenter's personal associations were revealed, and in July an corporation's own inquiry found it breached the corporation's journalistic standards on accuracy.
A representative for the broadcaster commented: "The Ofcom ruling is in agreement with the findings of the corporation's inquiry, that there was a major oversight in the documentary in relation to the corporation's content standards on accuracy, which corresponds to clause 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we agree with the authority's determination in its entirety. We will adhere to the penalty as soon as the timing and language are determined."
