The BBC was found to have committed a "major breach" of industry standards by failing to disclose that the narrator of a programme about the Gaza situation was the child of a Hamas administrator, as determined by British broadcasting authority Ofcom.
An inquiry by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has found that the programme was "significantly deceptive".
The BBC's director general had previously apologised, saying there had been "a major oversight in relation to factual correctness".
Ofcom has ordered the BBC to broadcast a evening declaration about its conclusions.
"Since this amounts to a significant violation of our code, we are ordering the corporation to air a message of our determinations against it on BBC Two at 9pm, with a date to be confirmed," it said.
'Risk to Undermine Credibility'
The watchdog's announcement said: "The inquiry we conducted concluded that the documentary's failure to disclose that the voice's male guardian held a position in the Hamas-run administration was substantially inaccurate.
"It meant that the audience did not have vital facts which may have been extremely pertinent to their assessment of the presenter and the details he provided.
"Confidence is at the core of the relationship between a television network and its viewers, particularly for a state-funded media outlet such as the public broadcaster.
"This error had the possibility to damage the exceptionally strong degrees of credibility that the public would have invested in a documentary produced by the BBC about the Gaza conflict."
The programme was pulled from iPlayer in last February after the narrator's familial connections came to light, and in the month of July an broadcaster's internal assessment found it infringed the organization's journalistic standards on accuracy.
A corporation official said: "The authority's determination is in agreement with the conclusions of the corporation's inquiry, that there was a serious error in the documentary in relation to the corporation's content standards on factual correctness, which aligns with Rule 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we agree with the authority's determination in complete. We will adhere to the sanction as soon as the schedule and wording are determined."
