The British broadcaster engaged in a "serious breach" of industry standards by omitting to mention that the voice of a documentary about the Gaza situation was the son of a Hamas official, as determined by British broadcasting authority Ofcom.
An investigation by the media regulator into the programme Gaza: How to Survive a Warzone has found that the documentary was "significantly deceptive".
The BBC's director general had already issued an apology, noting there had been "a significant failing in relation to factual correctness".
The regulator has ordered the BBC to transmit a evening statement about its decisions.
"Since this amounts to a major infringement of our rules, we are ordering the broadcaster to transmit a message of our findings against it on BBC2 at 9pm, with a timing to be confirmed," the regulator stated.
'Potential to Damage Confidence'
The watchdog's statement said: "Our probe found that the documentary's omission to reveal that the narrator's male guardian occupied a position in the Hamas-run government was substantially inaccurate.
"It meant that the audience did not have vital facts which may have been very significant to their judgment of the voice and the details he provided.
"Trust is at the center of the relationship between a television network and its viewers, notably for a national broadcasting corporation such as the British Broadcasting Corporation.
"This error had the potential to undermine the exceptionally strong amounts of credibility that audiences would have invested in a documentary produced by the BBC about the conflict in Gaza."
The film was removed from the BBC's streaming service in the month of February after the presenter's family links were revealed, and in this past July an corporation's own inquiry found it infringed the corporation's editorial guidelines on factual correctness.
A BBC spokesperson said: "The Ofcom ruling is in agreement with the conclusions of the corporation's inquiry, that there was a serious error in the documentary in relation to the corporation's content standards on accuracy, 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 complete. We will follow the penalty as soon as the date and language are determined."
