The British broadcaster committed a "major breach" of media regulations by failing to disclose that the presenter of a programme about the Gaza conflict was the son of a Hamas representative, as ruled by regulatory body Ofcom.
An probe by the broadcasting watchdog into Gaza: How to Survive a Warzone has found that the documentary was "significantly deceptive".
The head of the BBC had earlier expressed regret, saying there had been "a serious error in relation to factual correctness".
The authority has ordered the broadcaster to transmit a prime-time statement about its conclusions.
"As this represents a serious breach of our regulations, we are directing the corporation to transmit a message of our determinations against it on BBC2 at 21:00, with a date to be finalised," the regulator stated.
'Risk to Damage Credibility'
The authority's announcement said: "Our investigation found that the film's failure to disclose that the presenter's parent held a post in the Hamas-run government was significantly deceptive.
"This implied that the audience did not have essential details which may have been very significant to their judgment of the narrator and the information he provided.
"Trust is at the center of the bond between a broadcaster and its audience, especially for a public service broadcaster such as the public broadcaster.
"This oversight had the potential to erode the very considerable amounts of confidence that viewers would have placed in a BBC factual programme about the Gaza conflict."
The film was withdrawn from iPlayer in February after the presenter's family links emerged, and in July an corporation's own inquiry concluded it breached the organization's editorial guidelines on truthfulness.
A representative for the broadcaster stated: "The authority's determination is in line with the findings of the internal assessment, that there was a major oversight in the film in relation to the BBC's Editorial Guidelines on accuracy, which corresponds to regulation 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we comply with Ofcom's decision in complete. We will follow the directive as soon as the schedule and language are finalised."
