The public service broadcaster was found to have committed a "significant breach" of media regulations by failing to disclose that the narrator of a documentary about the Gaza conflict was the child of a Hamas official, as ruled by regulatory body Ofcom.
An inquiry by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has determined that the programme was "materially misleading".
The head of the BBC had previously apologised, saying there had been "a serious error in relation to factual correctness".
The authority has directed the BBC to transmit a peak-time declaration about its decisions.
"Since this amounts to a serious breach of our code, we are ordering the corporation to air a statement of our conclusions against it on BBC Two at 21:00, with a schedule to be determined," the statement read.
'Risk to Undermine Trust'
The watchdog's announcement stated: "The inquiry we conducted concluded that the film's lack of disclosure that the voice's parent held a post in the Hamas-controlled authority was substantially inaccurate.
"This implied that the viewers did not have vital facts which may have been very significant to their evaluation of the presenter and the content he presented.
"Trust is at the core of the bond between a media organization and its viewers, notably for a public service broadcaster such as the public broadcaster.
"This oversight had the potential to damage the exceptionally strong degrees of confidence that viewers would have put in a factual film from the broadcaster about the conflict in Gaza."
The programme was pulled from iPlayer in last February after the narrator's personal associations came to light, and in this past July an broadcaster's internal assessment concluded it violated the broadcaster's editorial guidelines on truthfulness.
A corporation official stated: "The authority's determination is in agreement with the results of Peter Johnston's review, that there was a serious error in the programme in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to regulation 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we agree with Ofcom's decision in full. We will follow the directive as soon as the date and wording are determined."
