The public service broadcaster engaged in a "significant breach" of industry standards by failing to disclose that the narrator of a film about Gaza was the son of a Hamas official, as determined by British broadcasting authority Ofcom.
An investigation by the media regulator into the documentary titled Gaza: How to Survive a Warzone has found that the documentary was "significantly deceptive".
The head of the BBC had already issued an apology, noting there had been "a major oversight in relation to truthfulness".
The authority has directed the broadcaster to transmit a peak-time declaration about its decisions.
"Since this amounts to a major infringement of our regulations, we are ordering the corporation to broadcast a statement of our conclusions against it on BBC2 at nine o'clock in the evening, with a timing to be confirmed," the regulator stated.
'Risk to Undermine Confidence'
The regulator's report said: "Our probe found that the film's lack of disclosure that the voice's father served in a post in the Hamas-run authority was significantly deceptive.
"Consequently that the public did not have critical information which may have been highly relevant to their assessment of the voice and the information he shared.
"Trust is at the core of the connection between a media organization and its public, especially for a public service broadcaster such as the public broadcaster.
"This error had the risk to damage the exceptionally strong degrees of credibility that viewers would have put in a BBC factual programme about the Gaza conflict."
The documentary was withdrawn from iPlayer in last February after the narrator's family links were revealed, and in July an internal BBC review concluded it breached the organization's content policies on factual correctness.
A representative for the broadcaster stated: "The regulator's decision is in accordance with the findings of Peter Johnston's review, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on accuracy, which reflects Rule 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept the regulator's ruling in full. We will follow the directive as soon as the date and wording are finalised."
