The British broadcaster was found to have committed a "serious breach" of industry standards by failing to disclose that the narrator of a programme about Gaza was the child of a Hamas official, according to regulatory body Ofcom.
An inquiry by Ofcom into the documentary titled Gaza: How to Survive a Warzone has determined that the documentary was "materially misleading".
The head of the BBC had already issued an apology, saying there had been "a major oversight in relation to truthfulness".
Ofcom has ordered the BBC to air a prime-time statement about its conclusions.
"Given this constitutes a serious breach of our regulations, we are ordering the BBC to broadcast a announcement of our conclusions against it on BBC Two at nine o'clock in the evening, with a schedule to be finalised," the regulator stated.
'Possibility to Erode Confidence'
The regulator's statement stated: "The inquiry we conducted found that the documentary's failure to disclose that the narrator's male guardian occupied a post in the Hamas-administered government was substantially inaccurate.
"This implied that the viewers did not have essential details which may have been very significant to their judgment of the presenter and the information he provided.
"Confidence is at the core of the relationship between a television network and its viewers, notably for a national broadcasting corporation such as the BBC.
"This oversight had the possibility to erode the very considerable amounts of credibility that viewers would have invested in a BBC factual programme about the conflict in Gaza."
The programme was removed from the BBC's streaming service in the month of February after the boy's personal associations emerged, and in July an corporation's own inquiry concluded it infringed the organization's journalistic standards on accuracy.
A corporation official stated: "The authority's determination is in agreement with the conclusions of the internal assessment, that there was a major oversight in the film in relation to the corporation's content standards on factual correctness, which reflects Rule 2.2 of the regulator's media standards.
"We issued an apology for this and we comply with Ofcom's decision in complete. We will follow the sanction as soon as the schedule and wording are finalised."
