The public service broadcaster was found to have committed a "major breach" of industry standards by omitting to mention that the presenter of a film about the Gaza conflict was the son of a Hamas administrator, as ruled by British broadcasting authority Ofcom.
An investigation by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has found that the film was "materially misleading".
The head of the BBC had earlier expressed regret, saying there had been "a significant failing in relation to accuracy".
The regulator has instructed the BBC to broadcast a evening statement about its conclusions.
"Since this amounts to a significant violation of our code, we are instructing the broadcaster to broadcast a announcement of our findings against it on the BBC's second channel at 21:00, with a timing to be determined," it said.
'Possibility to Damage Credibility'
The regulator's announcement said: "Our investigation found that the documentary's omission to reveal that the voice's parent held a role in the Hamas-administered authority was significantly deceptive.
"Consequently that the public did not have essential details which may have been highly relevant to their judgment of the presenter and the content he provided.
"Trust is at the center of the relationship between a media organization and its public, particularly for a national broadcasting corporation such as the public broadcaster.
"This error had the risk to undermine the significantly high degrees of credibility that audiences would have invested in a factual film from the broadcaster about the Gaza conflict."
The film was withdrawn from iPlayer in the month of February after the presenter's familial connections came to light, and in July an broadcaster's internal assessment determined it breached the broadcaster's journalistic standards on truthfulness.
A corporation official stated: "The Ofcom ruling is in accordance with the results of the internal assessment, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on accuracy, which reflects regulation 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we accept the authority's determination in complete. We will adhere to the sanction as soon as the schedule and wording are finalised."
