The BBC was found to have committed a "significant breach" of broadcasting rules by omitting to mention that the voice of a programme about the Gaza situation was the offspring of a Hamas administrator, as ruled by UK media regulator Ofcom.
An inquiry by the media regulator into the programme Gaza: How to Survive a Warzone has found that the programme was "significantly deceptive".
The head of the BBC had already issued an apology, noting there had been "a serious error in relation to factual correctness".
The regulator has ordered the broadcaster to air a prime-time statement about its decisions.
"Given this constitutes a major infringement of our code, we are instructing the BBC to air a announcement of our conclusions against it on the BBC's second channel at 21:00, with a schedule to be confirmed," it said.
'Potential to Undermine Credibility'
The regulator's statement said: "Our probe concluded that the documentary's omission to reveal that the narrator's father held a post in the Hamas-controlled administration was significantly deceptive.
"Consequently that the public did not have essential details which may have been highly relevant to their judgment of the presenter and the details he shared.
"Trust is at the heart of the connection between a television network and its audience, particularly for a state-funded media outlet such as the BBC.
"This oversight had the possibility to undermine the exceptionally strong levels of confidence that viewers would have put in a factual film from the broadcaster about the conflict in Gaza."
The programme was removed from iPlayer in the month of February after the presenter's familial connections came to light, and in this past July an internal BBC review determined it infringed the corporation's content policies on factual correctness.
A BBC spokesperson stated: "The regulator's decision is in accordance with the findings of the corporation's inquiry, that there was a serious error in the documentary in relation to the BBC's Editorial Guidelines on accuracy, which aligns with regulation 2.2 of the regulator's media standards.
"We expressed regret for this and we accept Ofcom's decision in its entirety. We will comply with the directive as soon as the date and wording are determined."
