The public service broadcaster was found to have committed a "serious breach" of broadcasting rules by omitting to mention that the voice of a film about the Gaza situation was the son of a Hamas official, as determined by British broadcasting authority Ofcom.
An probe by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has found that the documentary was "substantially inaccurate".
The head of the BBC had previously apologised, saying there had been "a major oversight in relation to factual correctness".
The authority has instructed the corporation to transmit a prime-time declaration about its findings.
"As this represents a major infringement of our rules, we are ordering the BBC to transmit a announcement of our conclusions against it on BBC2 at 9pm, with a date to be determined," the regulator stated.
'Potential to Erode Credibility'
The watchdog's report declared: "Our investigation determined that the documentary's lack of disclosure that the presenter's father served in a post in the Hamas-administered administration was substantially inaccurate.
"This implied that the viewers did not have essential details which may have been highly relevant to their assessment of the presenter and the content he shared.
"Trust is at the core of the bond between a television network and its viewers, especially for a public service broadcaster such as the BBC.
"This failing had the risk to undermine the significantly high amounts of trust that viewers would have placed in a documentary produced by the BBC about the conflict in Gaza."
The documentary was withdrawn from the online platform in February after the narrator's personal associations emerged, and in the month of July an broadcaster's internal assessment concluded it breached the corporation's content policies on accuracy.
A representative for the broadcaster said: "The Ofcom ruling is in line with the results of the internal assessment, that there was a serious error in the programme in relation to the BBC's Editorial Guidelines on factual correctness, which aligns with Rule 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we comply with the regulator's ruling in complete. We will adhere to the penalty as soon as the schedule and language are confirmed."
