The BBC engaged in a "significant breach" of media regulations by not revealing that the presenter of a programme about the Gaza conflict was the child of a Hamas representative, as determined by British broadcasting authority Ofcom.
An probe by the media regulator into Gaza: How to Survive a Warzone has concluded that the programme was "materially misleading".
The chief executive of the broadcaster had previously apologised, saying there had been "a significant failing in relation to truthfulness".
The regulator has instructed the broadcaster to broadcast a evening declaration about its findings.
"As this represents a major infringement of our code, we are ordering the BBC to air a statement of our conclusions against it on BBC Two at 21:00, with a schedule to be determined," the regulator stated.
'Potential to Undermine Trust'
The authority's statement stated: "Our probe concluded that the film's failure to disclose that the narrator's father occupied a role in the Hamas-run administration was materially misleading.
"Consequently that the audience did not have vital facts which may have been extremely pertinent to their evaluation of the narrator and the content he presented.
"Trust is at the center of the relationship between a television network and its viewers, notably for a public service broadcaster such as the British Broadcasting Corporation.
"This oversight had the risk to undermine the exceptionally strong amounts of trust that the public would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The programme was removed from iPlayer in the month of February after the presenter's personal associations emerged, and in this past July an broadcaster's internal assessment concluded it violated the corporation's editorial guidelines on factual correctness.
A representative for the broadcaster stated: "The Ofcom ruling is in line 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 truthfulness, which reflects regulation 2.2 of the regulator's media standards.
"We issued an apology for this and we accept the authority's determination in its entirety. We will comply with the sanction as soon as the schedule and wording are finalised."
