The public service broadcaster was found to have committed a "serious breach" of media regulations by failing to disclose that the voice of a film about Gaza was the child of a Hamas representative, according to regulatory body Ofcom.
An investigation by Ofcom into the programme Gaza: How to Survive a Warzone has concluded that the programme was "significantly deceptive".
The head of the BBC had earlier expressed regret, stating there had been "a major oversight in relation to truthfulness".
The regulator has directed the broadcaster to broadcast a peak-time declaration about its decisions.
"As this represents a serious breach of our regulations, we are instructing the corporation to broadcast a announcement of our findings against it on BBC2 at 9pm, with a schedule to be determined," the statement read.
'Potential to Undermine Trust'
The authority's report stated: "The inquiry we conducted determined that the programme's omission to reveal that the voice's parent served in a role in the Hamas-administered government was substantially inaccurate.
"This implied that the viewers did not have vital facts which may have been extremely pertinent to their judgment of the narrator and the details he provided.
"Trust is at the center of the bond between a media organization and its viewers, particularly for a national broadcasting corporation such as the public broadcaster.
"This error had the risk to erode the exceptionally strong amounts of credibility that viewers would have placed in a factual film from the broadcaster about the Israel-Gaza war."
The film was withdrawn from the online platform in last February after the presenter's familial connections were revealed, and in July an broadcaster's internal assessment concluded it breached the corporation's content policies on accuracy.
A corporation official said: "The Ofcom ruling is in accordance with the findings of the internal assessment, that there was a serious error in the programme in relation to the broadcaster's journalistic policies on truthfulness, which reflects regulation 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we agree with the authority's determination in its entirety. We will adhere to the directive as soon as the schedule and wording are confirmed."
