The British broadcaster committed a "serious breach" of industry standards by failing to disclose that the presenter of a documentary about Gaza was the child of a Hamas representative, as ruled by regulatory body Ofcom.
An probe by the broadcasting watchdog into Gaza: How to Survive a Warzone has determined that the film was "significantly deceptive".
The head of the BBC had already issued an apology, noting there had been "a major oversight in relation to factual correctness".
The authority has instructed the corporation to broadcast a peak-time declaration about its findings.
"Given this constitutes a serious breach of our code, we are instructing the broadcaster to transmit a message of our findings against it on BBC Two at nine o'clock in the evening, with a timing to be finalised," the statement read.
'Risk to Erode Confidence'
The watchdog's announcement declared: "The inquiry we conducted concluded that the film's failure to disclose that the narrator's father occupied a role in the Hamas-controlled government was significantly deceptive.
"This implied that the audience did not have critical information which may have been highly relevant to their judgment of the voice and the details he presented.
"Credibility is at the core of the connection between a media organization and its audience, particularly for a public service broadcaster such as the BBC.
"This error had the risk to erode the significantly high amounts of trust that viewers would have invested in a BBC factual programme about the Israel-Gaza war."
The film was removed from the online platform in the month of February after the boy's familial connections were revealed, and in July an broadcaster's internal assessment determined it breached the broadcaster's editorial guidelines on truthfulness.
A representative for the broadcaster stated: "The regulator's decision is in line with the results of Peter Johnston's review, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on factual correctness, which corresponds to clause 2.2 of the regulator's media standards.
"We have apologised for this and we accept Ofcom's decision in full. We will comply with the penalty as soon as the date and wording are determined."
