The public service broadcaster committed a "significant breach" of broadcasting rules by not revealing that the presenter of a documentary about Gaza was the son of a Hamas administrator, as ruled by regulatory body Ofcom.
An probe by the media regulator into the programme Gaza: How to Survive a Warzone has found that the programme was "substantially inaccurate".
The BBC's director general had already issued an apology, stating there had been "a major oversight in relation to factual correctness".
The regulator has instructed the corporation to air a peak-time announcement about its conclusions.
"As this represents a serious breach of our rules, we are directing the BBC to transmit a statement of our findings against it on the BBC's second channel at 9pm, with a date to be determined," the statement read.
'Potential to Damage Credibility'
The authority's announcement declared: "Our probe determined that the film's failure to disclose that the voice's father occupied a post in the Hamas-controlled authority was substantially inaccurate.
"This implied that the audience did not have essential details which may have been extremely pertinent to their judgment of the voice and the details he shared.
"Confidence is at the heart of the bond between a broadcaster and its public, notably for a state-funded media outlet such as the BBC.
"This failing had the potential to damage the exceptionally strong degrees of trust that viewers would have invested in a factual film from the broadcaster about the conflict in Gaza."
The documentary was withdrawn from the online platform in February after the boy's personal associations emerged, and in the month of July an internal BBC review found it violated the broadcaster's editorial guidelines on truthfulness.
A BBC spokesperson said: "The authority's determination is in accordance with the findings of the corporation's inquiry, that there was a major oversight in the documentary in relation to the BBC's Editorial Guidelines on accuracy, which corresponds to clause 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we agree with the regulator's ruling in full. We will comply with the directive as soon as the timing and wording are finalised."
