The BBC committed a "serious breach" of broadcasting rules by failing to disclose that the voice of a documentary about the Gaza situation was the offspring of a Hamas administrator, according to British broadcasting authority Ofcom.
An investigation by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has found that the film was "significantly deceptive".
The head of the BBC had previously apologised, stating there had been "a significant failing in relation to factual correctness".
The authority has directed the BBC to air a prime-time statement about its findings.
"Since this amounts to a major infringement of our rules, we are ordering the corporation to transmit a statement of our determinations against it on the BBC's second channel at 9pm, with a date to be confirmed," it said.
'Potential to Undermine Credibility'
The regulator's statement said: "Our investigation concluded that the programme's failure to disclose that the presenter's male guardian served in a position in the Hamas-administered administration was materially misleading.
"This implied that the viewers did not have essential details which may have been very significant to their evaluation of the presenter and the content he shared.
"Confidence is at the center of the connection between a broadcaster and its audience, particularly for a national broadcasting corporation such as the public broadcaster.
"This oversight had the risk to undermine the very considerable degrees of confidence that the public would have invested in a documentary produced by the BBC about the conflict in Gaza."
The film was pulled from iPlayer in last February after the presenter's family links came to light, and in the month of July an corporation's own inquiry concluded it infringed the corporation's journalistic standards on accuracy.
A representative for the broadcaster said: "The Ofcom ruling is in line with the findings of the corporation's inquiry, that there was a major oversight in the documentary in relation to the BBC's Editorial Guidelines on factual correctness, which reflects Rule 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we comply with the regulator's ruling in complete. We will adhere to the directive as soon as the timing and wording are determined."