The public service broadcaster committed a "major breach" of broadcasting rules by omitting to mention that the voice of a documentary about the Gaza situation was the offspring of a Hamas official, according to British broadcasting authority Ofcom.
An probe by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the programme was "materially misleading".
The BBC's director general had earlier expressed regret, stating there had been "a major oversight in relation to factual correctness".
Ofcom has directed the corporation to air a prime-time statement about its decisions.
"As this represents a significant violation of our rules, we are ordering the BBC to air a announcement of our determinations against it on BBC2 at 9pm, with a schedule to be determined," it said.
'Potential to Undermine Credibility'
The authority's report stated: "Our probe concluded that the film's failure to disclose that the presenter's male guardian held a post in the Hamas-controlled government was materially misleading.
"Consequently that the viewers did not have vital facts which may have been very significant to their evaluation of the presenter and the information he presented.
"Trust is at the heart of the connection between a broadcaster and its audience, especially for a public service broadcaster such as the BBC.
"This error had the potential to damage the very considerable amounts of credibility that the public would have put in a documentary produced by the BBC about the Israel-Gaza war."
The programme was removed from iPlayer in the month of February after the presenter's familial connections were revealed, and in the month of July an internal BBC review concluded it violated the broadcaster's journalistic standards on truthfulness.
A corporation official said: "The Ofcom ruling is in accordance with the conclusions of the corporation's inquiry, that there was a serious error in the film in relation to the corporation's content standards on factual correctness, which aligns with clause 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we accept the authority's determination in its entirety. We will follow the directive as soon as the schedule and language are determined."
