The public service broadcaster engaged in a "major breach" of media regulations by failing to disclose that the presenter of a programme about the Gaza conflict was the child of a Hamas representative, as determined by regulatory body Ofcom.
An investigation by Ofcom into Gaza: How to Survive a Warzone has determined that the documentary was "substantially inaccurate".
The chief executive of the broadcaster had already issued an apology, stating there had been "a significant failing in relation to truthfulness".
Ofcom has ordered the broadcaster to air a peak-time declaration about its decisions.
"Given this constitutes a significant violation of our regulations, we are ordering the BBC to air a message of our findings against it on BBC2 at 9pm, with a schedule to be determined," the statement read.
'Possibility to Undermine Trust'
The regulator's report said: "Our probe found that the documentary's lack of disclosure that the narrator's parent 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 very significant to their judgment of the presenter and the content he shared.
"Trust is at the center of the relationship between a television network and its public, notably for a public service broadcaster such as the public broadcaster.
"This failing had the possibility to damage the significantly high amounts of credibility that the public would have placed in a BBC factual programme about the Israel-Gaza war."
The film was withdrawn from the BBC's streaming service in the month of February after the presenter's familial connections emerged, and in this past July an corporation's own inquiry determined it infringed the corporation's editorial guidelines on accuracy.
A representative for the broadcaster stated: "The authority's determination is in agreement with the results of the corporation's inquiry, that there was a major oversight in the film in relation to the BBC's Editorial Guidelines on truthfulness, which aligns with Rule 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we comply with the regulator's ruling in complete. We will follow the directive as soon as the schedule and wording are determined."
