The British broadcaster committed a "major breach" of broadcasting rules by omitting to mention that the narrator of a film about the Gaza conflict was the offspring of a Hamas representative, as determined by British broadcasting authority Ofcom.
An inquiry by the media regulator into the documentary titled Gaza: How to Survive a Warzone has found that the film was "significantly deceptive".
The BBC's director general had previously apologised, stating there had been "a serious error in relation to factual correctness".
The regulator has directed the corporation to transmit a evening statement about its conclusions.
"Given this constitutes a serious breach of our code, we are ordering the BBC to transmit a message of our findings against it on BBC2 at 21:00, with a schedule to be finalised," it said.
'Possibility to Damage Credibility'
The regulator's statement stated: "Our investigation concluded that the film's lack of disclosure that the narrator's male guardian served in a role in the Hamas-run administration was significantly deceptive.
"It meant that the public did not have vital facts which may have been very significant to their judgment of the voice and the content he shared.
"Confidence is at the heart of the bond between a broadcaster and its audience, particularly for a state-funded media outlet such as the British Broadcasting Corporation.
"This error had the possibility to undermine the very considerable degrees of trust that viewers would have placed in a factual film from the broadcaster about the Gaza conflict."
The documentary was pulled from iPlayer in last February after the presenter's family links came to light, and in this past July an corporation's own inquiry concluded it breached the organization's journalistic standards on truthfulness.
A corporation official said: "The regulator's decision is in line with the results of Peter Johnston's review, that there was a significant failing in the documentary in relation to the corporation's content standards on factual correctness, which reflects clause 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we accept the authority's determination in full. We will comply with the penalty as soon as the schedule and wording are confirmed."
