The public service broadcaster committed a "significant breach" of broadcasting rules by not revealing that the narrator of a programme about the Gaza conflict was the child of a Hamas official, as determined by regulatory body Ofcom.
An inquiry by the media regulator into Gaza: How to Survive a Warzone has found that the film was "substantially inaccurate".
The chief executive of the broadcaster had previously apologised, noting there had been "a significant failing in relation to accuracy".
The regulator has ordered the BBC to broadcast a evening statement about its findings.
"Since this amounts to a significant violation of our code, we are ordering the broadcaster to air a message of our conclusions against it on BBC Two at 9pm, with a timing to be determined," it said.
'Potential to Erode Trust'
The regulator's announcement declared: "The inquiry we conducted concluded that the programme's lack of disclosure that the narrator's parent served in a post in the Hamas-run authority was substantially inaccurate.
"Consequently that the viewers did not have vital facts which may have been highly relevant to their assessment of the presenter and the information he presented.
"Credibility is at the core of the connection between a broadcaster and its viewers, notably for a state-funded media outlet such as the public broadcaster.
"This failing had the risk to damage the significantly high degrees of credibility that audiences would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The film was pulled from iPlayer in the month of February after the narrator's family links emerged, and in the month of July an corporation's own inquiry concluded it breached the corporation's content policies on factual correctness.
A representative for the broadcaster stated: "The Ofcom ruling is in line with the findings of the corporation's inquiry, that there was a significant failing in the documentary in relation to the BBC's Editorial Guidelines on truthfulness, which reflects clause 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept Ofcom's decision in its entirety. We will comply with the sanction as soon as the timing and language are determined."
