The public service broadcaster engaged in a "serious breach" of industry standards by failing to disclose that the narrator of a documentary about the Gaza conflict was the child of a Hamas administrator, according to UK media regulator Ofcom.
An inquiry by Ofcom into the programme Gaza: How to Survive a Warzone has concluded that the documentary was "substantially inaccurate".
The head of the BBC had already issued an apology, stating there had been "a serious error in relation to truthfulness".
Ofcom has instructed the BBC to air a peak-time statement about its decisions.
"Since this amounts to a major infringement of our regulations, we are directing the BBC to transmit a announcement of our findings against it on BBC2 at 9pm, with a timing to be determined," the statement read.
'Risk to Undermine Credibility'
The authority's report declared: "Our probe determined that the documentary's omission to reveal that the voice's father served in a position in the Hamas-controlled administration was substantially inaccurate.
"This implied that the audience did not have essential details which may have been very significant to their judgment of the presenter and the details he presented.
"Trust is at the center of the relationship between a television network and its viewers, particularly for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the potential to undermine the very considerable degrees of credibility that audiences would have invested in a BBC factual programme about the Gaza conflict."
The film was removed from the online platform in February after the narrator's familial connections came to light, and in this past July an internal BBC review concluded it infringed the broadcaster's editorial guidelines on factual correctness.
A corporation official said: "The Ofcom ruling is in line with the findings of the internal assessment, that there was a major oversight in the documentary in relation to the BBC's Editorial Guidelines on truthfulness, which corresponds to Rule 2.2 of the regulator's media standards.
"We have apologised for this and we agree with the regulator's ruling in its entirety. We will follow the directive as soon as the date and language are determined."
