The British broadcaster committed a "significant breach" of industry standards by failing to disclose that the voice of a programme about Gaza was the offspring of a Hamas official, as determined by British broadcasting authority Ofcom.
An inquiry by the broadcasting watchdog into Gaza: How to Survive a Warzone has found that the film was "significantly deceptive".
The head of the BBC had already issued an apology, stating there had been "a significant failing in relation to factual correctness".
The regulator has directed the BBC to air a evening announcement about its findings.
"Since this amounts to a significant violation of our code, we are directing the corporation to air a announcement of our findings against it on BBC Two at 21:00, with a schedule to be determined," the statement read.
'Potential to Damage Credibility'
The authority's announcement said: "Our investigation found that the programme's lack of disclosure that the narrator's father served in a position in the Hamas-run authority was significantly deceptive.
"Consequently that the public did not have critical information which may have been very significant to their evaluation of the voice and the information he shared.
"Trust is at the heart of the connection between a media organization and its viewers, especially for a public service broadcaster such as the public broadcaster.
"This failing had the risk to damage the exceptionally strong levels of credibility that viewers would have invested in a BBC factual programme about the Gaza conflict."
The documentary was pulled from iPlayer in February after the presenter's familial connections emerged, and in this past July an corporation's own inquiry determined it infringed the broadcaster's journalistic standards on truthfulness.
A corporation official stated: "The regulator's decision is in line with the conclusions of Peter Johnston's review, that there was a significant failing in the documentary in relation to the corporation's content standards on factual correctness, which reflects regulation 2.2 of the regulator's media standards.
"We issued an apology for this and we accept the regulator's ruling in its entirety. We will adhere to the directive as soon as the date and wording are determined."
