The BBC committed a "serious breach" of broadcasting rules by omitting to mention that the voice of a documentary about the Gaza situation was the son of a Hamas representative, as ruled by British broadcasting authority Ofcom.
An inquiry by the broadcasting watchdog into Gaza: How to Survive a Warzone has determined that the documentary was "substantially inaccurate".
The BBC's director general had earlier expressed regret, stating there had been "a major oversight in relation to accuracy".
The authority has directed the broadcaster to air a prime-time statement about its decisions.
"Given this constitutes a significant violation of our regulations, we are instructing the broadcaster to transmit a message of our determinations against it on the BBC's second channel at 9pm, with a schedule to be confirmed," the statement read.
'Possibility to Damage Confidence'
The regulator's announcement stated: "Our investigation found that the documentary's omission to reveal that the narrator's male guardian served in a position in the Hamas-run authority was significantly deceptive.
"It meant that the public did not have essential details which may have been extremely pertinent to their evaluation of the voice and the information he provided.
"Confidence is at the heart of the bond between a television network and its public, particularly for a state-funded media outlet such as the British Broadcasting Corporation.
"This error had the possibility to erode the significantly high amounts of confidence that viewers would have invested in a documentary produced by the BBC about the Gaza conflict."
The documentary was withdrawn from the BBC's streaming service in February after the narrator's family links were revealed, and in the month of July an corporation's own inquiry found it violated the corporation's journalistic standards on truthfulness.
A representative for the broadcaster commented: "The Ofcom ruling is in agreement with the conclusions of the corporation's inquiry, that there was a major oversight in the documentary in relation to the BBC's Editorial Guidelines on factual correctness, which corresponds to regulation 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we accept Ofcom's decision in complete. We will adhere to the directive as soon as the timing and wording are finalised."
