The British broadcaster engaged in a "serious breach" of media regulations by failing to disclose that the voice of a documentary about Gaza was the child of a Hamas official, as determined by British broadcasting authority Ofcom.
An investigation by the media regulator into the programme Gaza: How to Survive a Warzone has found that the documentary was "substantially inaccurate".
The BBC's director general had already issued an apology, saying there had been "a significant failing in relation to factual correctness".
The authority has directed the BBC to broadcast a evening declaration about its findings.
"Given this constitutes a significant violation of our rules, we are directing the broadcaster to air a announcement of our findings against it on the BBC's second channel at 21:00, with a timing to be finalised," the statement read.
'Possibility to Erode Confidence'
The watchdog's statement stated: "The inquiry we conducted determined that the programme's failure to disclose that the voice's parent served in a position in the Hamas-controlled government was materially misleading.
"Consequently that the audience did not have vital facts which may have been very significant to their assessment of the voice and the content he shared.
"Credibility is at the center of the connection between a media organization and its viewers, especially for a public service broadcaster such as the public broadcaster.
"This error had the possibility to erode the significantly high levels of confidence that viewers would have invested in a BBC factual programme about the conflict in Gaza."
The programme was pulled from the online platform in the month of February after the boy's family links emerged, and in the month of July an corporation's own inquiry concluded it violated the corporation's content policies on factual correctness.
A representative for the broadcaster stated: "The regulator's decision is in agreement with the findings of the corporation's inquiry, that there was a major oversight in the film in relation to the broadcaster's journalistic policies on factual correctness, which corresponds to Rule 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we comply with the regulator's ruling in full. We will follow the directive as soon as the date and wording are confirmed."