The BBC was found to have committed a "significant breach" of broadcasting rules by omitting to mention that the presenter of a film about the Gaza conflict was the son of a Hamas representative, as determined by UK media regulator Ofcom.
An investigation by Ofcom into the programme Gaza: How to Survive a Warzone has found that the film was "materially misleading".
The head of the BBC had previously apologised, noting there had been "a major oversight in relation to factual correctness".
The authority has directed the BBC to broadcast a evening announcement about its conclusions.
"Given this constitutes a serious breach of our code, we are directing the corporation to broadcast a message of our conclusions against it on the BBC's second channel at 9pm, with a timing to be confirmed," the regulator stated.
'Potential to Erode Confidence'
The regulator's announcement said: "Our investigation found that the programme's omission to reveal that the narrator's father occupied a position in the Hamas-run administration was significantly deceptive.
"It meant that the viewers did not have essential details which may have been extremely pertinent to their judgment of the narrator and the content he presented.
"Confidence is at the core of the relationship between a broadcaster and its viewers, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This error had the possibility to undermine the significantly high amounts of credibility that the public would have placed in a documentary produced by the BBC about the Israel-Gaza war."
The documentary was pulled from iPlayer in the month of February after the narrator's family links were revealed, and in July an corporation's own inquiry found it violated the corporation's editorial guidelines on factual correctness.
A corporation official stated: "The Ofcom ruling is in accordance with the findings of the corporation's inquiry, that there was a serious error in the documentary in relation to the BBC's Editorial Guidelines on accuracy, which aligns with Rule 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we comply with the regulator's ruling in its entirety. We will follow the penalty as soon as the schedule and wording are finalised."
