The British broadcaster engaged in a "major breach" of media regulations by omitting to mention that the voice of a film about the Gaza situation was the son of a Hamas representative, according to UK media regulator Ofcom.
An inquiry by the media regulator into the programme Gaza: How to Survive a Warzone has concluded that the programme was "significantly deceptive".
The chief executive of the broadcaster had earlier expressed regret, saying there had been "a serious error in relation to accuracy".
The authority has directed the BBC to broadcast a peak-time declaration about its decisions.
"Given this constitutes a serious breach of our code, we are ordering the broadcaster to transmit a announcement of our determinations against it on BBC Two at 21:00, with a date to be confirmed," the statement read.
'Potential to Erode Trust'
The authority's report stated: "Our probe determined that the documentary's lack of disclosure that the voice's parent served in a role in the Hamas-controlled administration was substantially inaccurate.
"Consequently that the public did not have essential details which may have been very significant to their evaluation of the narrator and the information he presented.
"Credibility is at the center of the bond between a television network and its public, notably for a public service broadcaster such as the British Broadcasting Corporation.
"This oversight had the potential to undermine the exceptionally strong amounts of confidence that audiences would have invested in a documentary produced by the BBC about the Gaza conflict."
The film was withdrawn from iPlayer in last February after the presenter's personal associations were revealed, and in the month of July an corporation's own inquiry determined it violated the corporation's editorial guidelines on factual correctness.
A representative for the broadcaster said: "The Ofcom ruling is in accordance with the results of the corporation's inquiry, that there was a significant failing in the film in relation to the broadcaster's journalistic policies on accuracy, which corresponds to regulation 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we agree with Ofcom's decision in full. We will follow the penalty as soon as the schedule and language are determined."
