The public service broadcaster committed a "serious breach" of media regulations by not revealing that the presenter of a film about Gaza was the child of a Hamas official, as determined by regulatory body Ofcom.
An inquiry by Ofcom into the documentary titled Gaza: How to Survive a Warzone has concluded that the film was "materially misleading".
The chief executive of the broadcaster had already issued an apology, saying there had been "a serious error in relation to factual correctness".
The regulator has ordered the corporation to air a evening declaration about its findings.
"Since this amounts to a serious breach of our rules, we are ordering the BBC to broadcast a message of our conclusions against it on BBC Two at 21:00, with a schedule to be confirmed," the statement read.
'Risk to Damage Credibility'
The authority's statement declared: "Our probe concluded that the programme's omission to reveal that the voice's parent held a position in the Hamas-run government was significantly deceptive.
"Consequently that the audience did not have critical information which may have been highly relevant to their assessment of the voice and the content he presented.
"Credibility is at the heart of the connection between a media organization and its public, especially for a state-funded media outlet such as the BBC.
"This oversight had the risk to undermine the very considerable degrees of confidence that audiences would have put in a documentary produced by the BBC about the Gaza conflict."
The film was removed from the online platform in last February after the narrator's family links came to light, and in the month of July an corporation's own inquiry determined it violated the organization's content policies on factual correctness.
A BBC spokesperson stated: "The regulator's decision is in agreement with the findings of the corporation's inquiry, that there was a serious error in the documentary in relation to the corporation's content standards on accuracy, which corresponds to clause 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we comply with the regulator's ruling in full. We will comply with the sanction as soon as the date and language are determined."
