The public service broadcaster was found to have committed a "significant breach" of media regulations by omitting to mention that the voice of a film about Gaza was the son of a Hamas representative, as determined by British broadcasting authority Ofcom.
An probe by Ofcom into the documentary titled Gaza: How to Survive a Warzone has concluded that the film was "significantly deceptive".
The head of the BBC had already issued an apology, saying there had been "a major oversight in relation to accuracy".
The regulator has directed the corporation to broadcast a evening statement about its conclusions.
"Given this constitutes a significant violation of our rules, we are instructing the corporation to transmit a message of our conclusions against it on the BBC's second channel at 21:00, with a timing to be confirmed," it said.
'Risk to Erode Trust'
The watchdog's announcement declared: "The inquiry we conducted found that the documentary's omission to reveal that the narrator's male guardian held a role in the Hamas-run authority was substantially inaccurate.
"Consequently that the viewers did not have essential details which may have been highly relevant to their assessment of the narrator and the details he shared.
"Trust is at the heart of the relationship between a media organization and its viewers, particularly for a public service broadcaster such as the British Broadcasting Corporation.
"This failing had the potential to damage the very considerable levels of trust that the public would have invested in a factual film from the broadcaster about the Gaza conflict."
The programme was pulled from the online platform in the month of February after the presenter's family links came to light, and in this past July an corporation's own inquiry found it violated the broadcaster's editorial guidelines on accuracy.
A corporation official said: "The Ofcom ruling is in line with the findings of Peter Johnston's review, that there was a serious error in the programme in relation to the BBC's Editorial Guidelines on truthfulness, which corresponds to clause 2.2 of the regulator's media standards.
"We have apologised for this and we accept Ofcom's decision in complete. We will follow the sanction as soon as the timing and wording are finalised."
