The public service broadcaster engaged in a "major breach" of media regulations by omitting to mention that the presenter of a documentary about the Gaza situation was the child of a Hamas representative, according to UK media regulator Ofcom.
An probe by the media regulator into the documentary titled Gaza: How to Survive a Warzone has determined that the documentary was "substantially inaccurate".
The head of the BBC had already issued an apology, saying there had been "a significant failing in relation to accuracy".
Ofcom has instructed the BBC to broadcast a prime-time declaration about its decisions.
"As this represents a major infringement of our rules, we are ordering the BBC to air a message of our determinations against it on BBC Two at nine o'clock in the evening, with a schedule to be determined," it said.
'Potential to Damage Credibility'
The authority's statement said: "Our investigation found that the documentary's failure to disclose that the presenter's parent held a position in the Hamas-run authority was materially misleading.
"This implied that the viewers did not have critical information which may have been highly relevant to their evaluation of the narrator and the information he shared.
"Credibility is at the center of the bond between a media organization and its public, especially for a public service broadcaster such as the British Broadcasting Corporation.
"This oversight had the possibility to damage the significantly high amounts of credibility that audiences would have put in a BBC factual programme about the conflict in Gaza."
The film was removed from the online platform in the month of February after the boy's familial connections came to light, and in July an broadcaster's internal assessment concluded it breached the corporation's journalistic standards on factual correctness.
A BBC spokesperson said: "The authority's determination is in accordance with the findings of the internal assessment, that there was a significant failing in the film in relation to the broadcaster's journalistic policies on truthfulness, which reflects regulation 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we comply with the authority's determination in its entirety. We will follow the penalty as soon as the date and language are determined."
