The BBC engaged in a "serious breach" of broadcasting rules by failing to disclose that the voice of a programme about the Gaza situation was the son 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 determined that the film was "significantly deceptive".
The chief executive of the broadcaster had already issued an apology, stating there had been "a significant failing in relation to factual correctness".
The authority has ordered the BBC to transmit a evening statement about its findings.
"As this represents a significant violation of our code, we are ordering the broadcaster to transmit a message of our determinations against it on BBC Two at 21:00, with a timing to be finalised," it said.
'Possibility to Damage Confidence'
The authority's announcement declared: "The inquiry we conducted determined that the documentary's lack of disclosure that the voice's male guardian held a position in the Hamas-administered authority was materially misleading.
"Consequently that the audience did not have essential details which may have been very significant to their assessment of the presenter and the details he presented.
"Credibility is at the heart of the connection between a television network and its public, notably for a national broadcasting corporation such as the public broadcaster.
"This error had the potential to undermine the very considerable levels of trust that audiences would have put in a factual film from the broadcaster about the Gaza conflict."
The documentary was removed from the BBC's streaming service in February after the narrator's personal associations came to light, and in this past July an broadcaster's internal assessment found it violated the corporation's journalistic standards on accuracy.
A BBC spokesperson stated: "The Ofcom ruling is in agreement with the conclusions of Peter Johnston's review, that there was a major oversight in the documentary in relation to the BBC's Editorial Guidelines on factual correctness, which reflects clause 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we comply with the authority's determination in its entirety. We will follow the penalty as soon as the timing and wording are confirmed."
