The public service broadcaster engaged in a "major breach" of media regulations by omitting to mention that the presenter of a programme about the Gaza conflict was the son of a Hamas representative, according to UK media regulator Ofcom.
An investigation by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has determined that the programme was "substantially inaccurate".
The head of the BBC had already issued an apology, saying there had been "a significant failing in relation to truthfulness".
The regulator has directed the BBC to air a evening declaration about its conclusions.
"Given this constitutes a major infringement of our rules, we are instructing the corporation to broadcast a message of our findings against it on BBC Two at nine o'clock in the evening, with a date to be confirmed," it said.
'Possibility to Undermine Credibility'
The watchdog's announcement declared: "Our probe determined that the documentary's omission to reveal that the presenter's male guardian held a position in the Hamas-run government was substantially inaccurate.
"Consequently that the audience did not have critical information which may have been extremely pertinent to their judgment of the voice and the details he shared.
"Credibility is at the core of the connection between a media organization and its viewers, particularly for a national broadcasting corporation such as the BBC.
"This failing had the risk to damage the very considerable levels of trust that viewers would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The documentary was pulled from the online platform in last February after the boy's familial connections came to light, and in July an corporation's own inquiry concluded it breached the organization's content policies on truthfulness.
A corporation official stated: "The authority's determination is in line with the findings of the internal assessment, that there was a major oversight in the documentary in relation to the corporation's content standards on factual correctness, which corresponds to Rule 2.2 of the regulator's media standards.
"We have apologised for this and we comply with the regulator's ruling in full. We will comply with the sanction as soon as the timing and language are finalised."
