The British broadcaster was found to have committed a "serious breach" of broadcasting rules by not revealing that the narrator of a programme about the Gaza situation was the son of a Hamas administrator, as ruled by British broadcasting authority Ofcom.
An probe by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has determined that the documentary was "significantly deceptive".
The BBC's director general had previously apologised, noting there had been "a major oversight in relation to factual correctness".
The authority has directed the corporation to transmit a evening declaration about its decisions.
"Since this amounts to a major infringement of our rules, we are ordering the BBC to broadcast a message of our determinations against it on BBC2 at 9pm, with a schedule to be finalised," the regulator stated.
'Potential to Damage Trust'
The authority's announcement stated: "Our investigation determined that the programme's lack of disclosure that the narrator's male guardian served in a position in the Hamas-run government was significantly deceptive.
"Consequently that the audience did not have essential details which may have been highly relevant to their assessment of the voice and the information he presented.
"Confidence is at the center of the relationship between a television network and its public, notably for a state-funded media outlet such as the BBC.
"This error had the possibility to damage the significantly high amounts of credibility that the public would have placed in a BBC factual programme about the conflict in Gaza."
The documentary was removed from the online platform in last February after the presenter's family links came to light, and in this past July an internal BBC review determined it breached the broadcaster's journalistic standards on accuracy.
A representative for the broadcaster commented: "The Ofcom ruling is in agreement with the conclusions of the corporation's inquiry, that there was a serious error in the film in relation to the BBC's Editorial Guidelines on truthfulness, which corresponds to clause 2.2 of the regulator's media standards.
"We expressed regret for this and we comply with the regulator's ruling in its entirety. We will follow the penalty as soon as the timing and wording are confirmed."
