The British broadcaster committed a "major breach" of industry standards by omitting to mention that the presenter of a film about Gaza was the child of a Hamas representative, as determined by British broadcasting authority Ofcom.
An investigation by Ofcom into the programme Gaza: How to Survive a Warzone has concluded that the programme was "materially misleading".
The BBC's director general had already issued an apology, noting there had been "a serious error in relation to factual correctness".
The authority has instructed the broadcaster to air a evening statement about its findings.
"As this represents a serious breach of our regulations, we are directing the broadcaster to air a statement of our determinations against it on BBC2 at nine o'clock in the evening, with a schedule to be finalised," the statement read.
'Potential to Undermine Credibility'
The watchdog's announcement said: "Our investigation found that the documentary's failure to disclose that the voice's parent held a post in the Hamas-administered government was materially misleading.
"This implied that the public did not have essential details which may have been highly relevant to their evaluation of the voice and the content he presented.
"Confidence is at the center of the relationship between a media organization and its audience, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the potential to undermine the exceptionally strong amounts of trust that viewers would have invested in a BBC factual programme about the conflict in Gaza."
The programme was pulled from the BBC's streaming service in the month of February after the boy's personal associations emerged, and in this past July an internal BBC review concluded it infringed the organization's editorial guidelines on factual correctness.
A representative for the broadcaster said: "The authority's determination is in line with the results of the internal assessment, that there was a major oversight in the programme in relation to the corporation's content standards on accuracy, which corresponds to clause 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept the regulator's ruling in its entirety. We will comply with the sanction as soon as the schedule and wording are determined."
