The public service broadcaster committed a "serious breach" of industry standards by not revealing that the presenter of a documentary about the Gaza conflict was the son of a Hamas administrator, according to UK media regulator Ofcom.
An inquiry by Ofcom into Gaza: How to Survive a Warzone has found that the documentary was "significantly deceptive".
The chief executive of the broadcaster had earlier expressed regret, noting there had been "a major oversight in relation to factual correctness".
The regulator has instructed the broadcaster to broadcast a evening announcement about its conclusions.
"Since this amounts to a major infringement of our code, we are instructing the corporation to transmit a statement of our determinations against it on BBC2 at 21:00, with a date to be determined," the regulator stated.
'Possibility to Damage Credibility'
The regulator's announcement said: "Our investigation determined that the documentary's lack of disclosure that the presenter's male guardian occupied a post in the Hamas-administered authority was significantly deceptive.
"Consequently that the viewers did not have vital facts which may have been very significant to their judgment of the narrator and the content he presented.
"Confidence is at the center of the relationship between a television network and its viewers, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This error had the potential to undermine the very considerable levels of confidence that the public would have placed in a BBC factual programme about the Gaza conflict."
The film was removed from the online platform in February after the presenter's family links were revealed, and in this past July an broadcaster's internal assessment determined it breached the broadcaster's content policies on factual correctness.
A corporation official stated: "The regulator's decision is in accordance with the findings 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 Rule 2.2 of the regulator's media standards.
"We issued an apology for this and we comply with the authority's determination in its entirety. We will adhere to the penalty as soon as the schedule and wording are determined."
