The public service broadcaster committed a "serious breach" of broadcasting rules by failing to disclose that the presenter of a programme about the Gaza conflict was the child of a Hamas official, as ruled by regulatory body Ofcom.
An inquiry by Ofcom into Gaza: How to Survive a Warzone has found that the programme was "materially misleading".
The BBC's director general had previously apologised, noting there had been "a serious error in relation to truthfulness".
The authority has ordered the broadcaster to transmit a prime-time announcement about its decisions.
"Since this amounts to a significant violation of our regulations, we are ordering the corporation to air a statement of our determinations against it on BBC Two at nine o'clock in the evening, with a schedule to be confirmed," the regulator stated.
'Potential to Undermine Credibility'
The regulator's statement stated: "Our investigation found that the documentary's omission to reveal that the narrator's father served in a role in the Hamas-run authority was substantially inaccurate.
"It meant that the audience did not have critical information which may have been highly relevant to their evaluation of the voice and the information he presented.
"Credibility is at the core of the connection between a media organization and its public, particularly for a public service broadcaster such as the public broadcaster.
"This failing had the possibility to undermine the very considerable degrees of trust that audiences would have placed in a BBC factual programme about the Israel-Gaza war."
The documentary was withdrawn from the online platform in the month of February after the boy's familial connections came to light, and in the month of July an corporation's own inquiry determined it infringed the organization's editorial guidelines on factual correctness.
A representative for the broadcaster stated: "The authority's determination is in accordance with the results of the corporation's inquiry, that there was a serious error in the programme in relation to the broadcaster's journalistic policies on factual correctness, which aligns with Rule 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we comply with Ofcom's decision in full. We will follow the sanction as soon as the date and wording are determined."
