The BBC engaged in a "serious breach" of broadcasting rules by not revealing that the presenter of a film about the Gaza situation was the child of a Hamas official, as ruled by UK media regulator Ofcom.
An investigation by the media regulator into the documentary titled Gaza: How to Survive a Warzone has determined that the film was "significantly deceptive".
The head of the BBC had previously apologised, noting there had been "a major oversight in relation to accuracy".
The regulator has directed the BBC to broadcast a prime-time declaration about its findings.
"Given this constitutes a significant violation of our code, we are directing the corporation to broadcast a announcement of our conclusions against it on BBC Two at 9pm, with a timing to be confirmed," the statement read.
'Possibility to Erode Confidence'
The regulator's statement said: "Our probe determined that the film's omission to reveal that the voice's parent held a position in the Hamas-administered authority was substantially inaccurate.
"This implied that the public did not have essential details which may have been extremely pertinent to their assessment of the voice and the information he shared.
"Confidence is at the core of the bond between a broadcaster and its public, notably for a public service broadcaster such as the BBC.
"This error had the potential to undermine the significantly high degrees of confidence that the public would have placed in a factual film from the broadcaster about the Gaza conflict."
The programme was removed from the online platform in the month of February after the presenter's personal associations were revealed, and in this past July an broadcaster's internal assessment found it breached the corporation's journalistic standards on factual correctness.
A BBC spokesperson stated: "The authority's determination is in accordance with the results of Peter Johnston's review, that there was a major oversight in the programme in relation to the corporation's content standards on accuracy, which reflects clause 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept the authority's determination in its entirety. We will comply with the sanction as soon as the schedule and wording are confirmed."
