The BBC was found to have committed a "major breach" of broadcasting rules by omitting to mention that the presenter of a documentary about Gaza was the offspring of a Hamas official, as ruled by regulatory body Ofcom.
An probe by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has determined that the programme was "significantly deceptive".
The head of the BBC had earlier expressed regret, saying there had been "a major oversight in relation to factual correctness".
Ofcom has ordered the corporation to transmit a evening announcement about its findings.
"Given this constitutes a serious breach of our rules, we are ordering the corporation to transmit a announcement of our conclusions against it on BBC Two at nine o'clock in the evening, with a date to be confirmed," the regulator stated.
'Risk to Erode Trust'
The watchdog's announcement declared: "The inquiry we conducted determined that the programme's omission to reveal that the narrator's father occupied a post in the Hamas-run administration was significantly deceptive.
"It meant that the viewers did not have critical information which may have been very significant to their assessment of the narrator and the content he provided.
"Credibility is at the core of the bond between a media organization and its public, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the risk to damage the exceptionally strong levels of confidence that audiences would have placed in a BBC factual programme about the conflict in Gaza."
The film was withdrawn from the online platform in the month of February after the narrator's familial connections came to light, and in this past July an broadcaster's internal assessment determined it violated the broadcaster's journalistic standards on accuracy.
A BBC spokesperson commented: "The Ofcom ruling is in agreement with the findings of Peter Johnston's review, that there was a major oversight in the documentary in relation to the corporation's content standards on factual correctness, which corresponds to regulation 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we agree with the authority's determination in full. We will comply with the penalty as soon as the date and wording are finalised."
