The British broadcaster engaged in a "serious breach" of industry standards by not revealing that the presenter of a programme about Gaza was the offspring of a Hamas official, according to regulatory body Ofcom.
An investigation by the media regulator into Gaza: How to Survive a Warzone has determined that the programme was "significantly deceptive".
The chief executive of the broadcaster had already issued an apology, saying there had been "a major oversight in relation to factual correctness".
The regulator has directed the broadcaster to air a prime-time statement about its findings.
"Given this constitutes a major infringement of our code, we are directing the BBC to air a statement of our determinations against it on the BBC's second channel at 9pm, with a date to be determined," the regulator stated.
'Potential to Undermine Trust'
The watchdog's announcement said: "Our probe found that the film's failure to disclose that the voice's parent occupied a position in the Hamas-controlled administration was substantially inaccurate.
"Consequently that the audience did not have vital facts which may have been extremely pertinent to their evaluation of the narrator and the content he shared.
"Trust is at the heart of the relationship between a television network and its audience, notably for a state-funded media outlet such as the public broadcaster.
"This oversight had the risk to undermine the very considerable degrees of confidence that audiences would have put in a documentary produced by the BBC about the conflict in Gaza."
The film was removed from the online platform in the month of February after the presenter's family links came to light, and in July an broadcaster's internal assessment found it breached the organization's journalistic standards on accuracy.
A representative for the broadcaster stated: "The Ofcom ruling is in accordance with the results of Peter Johnston's review, that there was a major oversight in the film in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to regulation 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we agree with Ofcom's decision in complete. We will comply with the penalty as soon as the timing and wording are confirmed."
