The British broadcaster was found to have committed a "serious breach" of industry standards by not revealing that the narrator of a documentary about the Gaza situation was the son of a Hamas administrator, as ruled by regulatory body Ofcom.
An inquiry by Ofcom into the programme Gaza: How to Survive a Warzone has found that the documentary was "materially misleading".
The chief executive of the broadcaster had already issued an apology, noting there had been "a serious error in relation to accuracy".
The regulator has directed the BBC to broadcast a prime-time announcement about its conclusions.
"Since this amounts to a serious breach of our rules, we are ordering the corporation to broadcast a announcement of our findings against it on BBC2 at 9pm, with a timing to be confirmed," the statement read.
'Potential to Erode Credibility'
The watchdog's announcement declared: "Our investigation found that the documentary's lack of disclosure that the presenter's parent occupied a position in the Hamas-controlled authority was materially misleading.
"This implied that the viewers did not have vital facts which may have been very significant to their judgment of the presenter and the content he provided.
"Credibility is at the center of the relationship between a television network and its audience, particularly for a public service broadcaster such as the public broadcaster.
"This error had the potential to damage the very considerable levels of credibility that viewers would have invested in a factual film from the broadcaster about the Gaza conflict."
The programme was removed from iPlayer in the month of February after the presenter's personal associations came to light, and in the month of July an broadcaster's internal assessment determined it breached the organization's editorial guidelines on truthfulness.
A corporation official said: "The Ofcom ruling is in agreement with the conclusions of the corporation's inquiry, that there was a major oversight in the film in relation to the broadcaster's journalistic policies on accuracy, which corresponds to Rule 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we agree with Ofcom's decision in full. We will follow the directive as soon as the schedule and wording are finalised."
