The British broadcaster engaged in a "major breach" of broadcasting rules by omitting to mention that the presenter of a documentary about the Gaza situation was the offspring of a Hamas official, as determined by regulatory body Ofcom.
An inquiry by Ofcom into the documentary titled Gaza: How to Survive a Warzone has concluded that the programme was "substantially inaccurate".
The chief executive of the broadcaster had previously apologised, saying there had been "a significant failing in relation to accuracy".
The regulator has instructed the BBC to air a peak-time statement about its conclusions.
"Given this constitutes a significant violation of our rules, we are ordering the broadcaster to transmit a message of our conclusions against it on BBC Two at 21:00, with a timing to be confirmed," it said.
'Possibility to Undermine Trust'
The authority's announcement declared: "The inquiry we conducted found that the programme's failure to disclose that the narrator's father served in a post in the Hamas-run government was substantially inaccurate.
"It meant that the audience did not have essential details which may have been very significant to their assessment of the voice and the information he presented.
"Credibility is at the core of the connection between a television network and its audience, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This oversight had the possibility to undermine the exceptionally strong levels of credibility that audiences would have invested in a factual film from the broadcaster about the Gaza conflict."
The programme was pulled from the BBC's streaming service in last February after the boy's familial connections came to light, and in this past July an corporation's own inquiry concluded it infringed the organization's content policies on accuracy.
A BBC spokesperson commented: "The authority's determination is in accordance with the results of the internal assessment, that there was a serious error in the programme in relation to the broadcaster's journalistic policies on factual correctness, which aligns with regulation 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we accept the regulator's ruling in complete. We will follow the penalty as soon as the date and wording are finalised."