The public service broadcaster committed a "serious breach" of media regulations by omitting to mention that the voice of a documentary about the Gaza conflict was the child of a Hamas administrator, as determined by regulatory body Ofcom.
An probe by the media regulator into Gaza: How to Survive a Warzone has concluded that the film was "significantly deceptive".
The head of the BBC had previously apologised, stating there had been "a major oversight in relation to factual correctness".
Ofcom has ordered the corporation to transmit a peak-time declaration about its conclusions.
"As this represents 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 nine o'clock in the evening, with a timing to be finalised," it said.
'Possibility to Erode Trust'
The watchdog's announcement stated: "Our investigation determined that the film's failure to disclose that the presenter's father served in a role in the Hamas-administered administration was substantially inaccurate.
"It meant that the audience did not have vital facts which may have been extremely pertinent to their assessment of the narrator and the details he provided.
"Confidence is at the core of the connection between a television network and its audience, especially for a public service broadcaster such as the British Broadcasting Corporation.
"This oversight had the possibility to damage the exceptionally strong levels of confidence that viewers would have put in a BBC factual programme about the conflict in Gaza."
The film was pulled from the BBC's streaming service in February after the boy's personal associations came to light, and in the month of July an corporation's own inquiry determined it breached the broadcaster's content policies on accuracy.
A BBC spokesperson commented: "The Ofcom ruling is in agreement with the conclusions of the corporation's inquiry, that there was a significant failing in the documentary in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to clause 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we accept Ofcom's decision in its entirety. We will adhere to the directive as soon as the date and language are confirmed."
