The public service broadcaster committed a "serious breach" of media regulations by failing to disclose that the voice 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 documentary titled Gaza: How to Survive a Warzone has determined that the programme was "materially misleading".
The head of the BBC had earlier expressed regret, noting there had been "a major oversight in relation to factual correctness".
Ofcom has ordered the broadcaster to broadcast a peak-time statement about its findings.
"Since this amounts to a major infringement of our code, we are instructing the BBC to broadcast a statement of our findings against it on BBC Two at 21:00, with a timing to be determined," the regulator stated.
'Risk to Damage Trust'
The watchdog's report declared: "Our probe determined that the film's failure to disclose that the voice's male guardian occupied a position in the Hamas-administered authority was substantially inaccurate.
"It meant that the audience did not have critical information which may have been highly relevant to their judgment of the presenter and the content he provided.
"Trust is at the core of the bond between a television network and its public, especially for a public service broadcaster such as the public broadcaster.
"This error had the possibility to undermine the exceptionally strong levels of trust that audiences would have invested in a BBC factual programme about the conflict in Gaza."
The documentary was withdrawn from the online platform in the month of February after the narrator's familial connections emerged, and in this past July an corporation's own inquiry determined it breached the corporation's editorial guidelines on accuracy.
A BBC spokesperson said: "The Ofcom ruling is in agreement with the findings of the internal assessment, that there was a serious error in the film in relation to the BBC's Editorial Guidelines on accuracy, which aligns with clause 2.2 of the regulator's media standards.
"We expressed regret for this and we agree with the regulator's ruling in complete. We will follow the sanction as soon as the timing and wording are determined."
