The public service broadcaster engaged in a "significant breach" of media regulations by not revealing that the narrator of a documentary about the Gaza situation was the offspring of a Hamas official, as ruled by UK media regulator Ofcom.
An probe by the media regulator into the documentary titled Gaza: How to Survive a Warzone has found that the film was "substantially inaccurate".
The chief executive of the broadcaster had previously apologised, stating there had been "a major oversight in relation to factual correctness".
The regulator has directed the BBC to transmit a peak-time announcement about its conclusions.
"Since this amounts to a significant violation of our rules, we are ordering the corporation to air a announcement of our findings against it on BBC2 at nine o'clock in the evening, with a date to be confirmed," the statement read.
'Risk to Undermine Trust'
The authority's report declared: "Our investigation concluded that the documentary's failure to disclose that the voice's father held a post in the Hamas-administered government was substantially inaccurate.
"It meant that the viewers did not have vital facts which may have been extremely pertinent to their judgment of the narrator and the details he provided.
"Credibility is at the core of the connection between a media organization and its public, particularly for a public service broadcaster such as the British Broadcasting Corporation.
"This oversight had the risk to erode the significantly high degrees of credibility that audiences would have placed in a BBC factual programme about the Israel-Gaza war."
The programme was withdrawn from iPlayer in February after the presenter's personal associations were revealed, and in the month of July an broadcaster's internal assessment found it breached the organization's editorial guidelines on truthfulness.
A BBC spokesperson said: "The Ofcom ruling is in line with the results of Peter Johnston's review, that there was a major oversight in the programme in relation to the broadcaster's journalistic policies on truthfulness, which reflects clause 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we comply with the authority's determination in full. We will follow the penalty as soon as the schedule and wording are confirmed."
