The British broadcaster engaged in a "major breach" of industry standards by not revealing that the presenter of a programme about the Gaza situation was the child of a Hamas official, according to British broadcasting authority Ofcom.
An inquiry by Ofcom into the documentary titled Gaza: How to Survive a Warzone has concluded that the film was "significantly deceptive".
The head of the BBC had earlier expressed regret, stating there had been "a major oversight in relation to accuracy".
Ofcom has directed the broadcaster to air a prime-time declaration about its conclusions.
"Since this amounts to a significant violation of our code, we are directing the broadcaster to broadcast a statement of our conclusions against it on BBC2 at nine o'clock in the evening, with a timing to be determined," the statement read.
'Potential to Damage Credibility'
The regulator's report declared: "The inquiry we conducted found that the film's omission to reveal that the voice's parent held a position in the Hamas-run administration was substantially inaccurate.
"Consequently that the audience did not have critical information which may have been extremely pertinent to their assessment of the narrator and the content he provided.
"Confidence is at the heart of the bond between a broadcaster and its viewers, notably for a state-funded media outlet such as the public broadcaster.
"This oversight had the risk to erode the significantly high amounts of trust that viewers would have put in a documentary produced by the BBC about the Israel-Gaza war."
The film was removed from iPlayer in the month of February after the narrator's familial connections were revealed, and in July an corporation's own inquiry determined it violated the broadcaster's content policies on accuracy.
A representative for the broadcaster said: "The authority's determination is in agreement with the findings of the internal assessment, that there was a serious error in the film in relation to the BBC's Editorial Guidelines on truthfulness, which reflects Rule 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we comply with Ofcom's decision in its entirety. We will adhere to the sanction as soon as the schedule and wording are determined."
