The BBC committed a "serious breach" of media regulations by omitting to mention that the voice of a documentary about the Gaza conflict was the son of a Hamas administrator, according to UK media regulator Ofcom.
An inquiry by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has determined that the programme was "substantially inaccurate".
The head of the BBC had previously apologised, noting there had been "a serious error in relation to accuracy".
The regulator has ordered the corporation to broadcast a evening declaration about its decisions.
"As this represents a significant violation of our regulations, we are instructing the BBC to air a announcement of our determinations against it on the BBC's second channel at 9pm, with a date to be determined," the regulator stated.
'Possibility to Erode Trust'
The watchdog's statement said: "Our probe concluded that the film's failure to disclose that the presenter's father served in a post in the Hamas-run government was significantly deceptive.
"This implied that the public did not have essential details which may have been very significant to their assessment of the presenter and the details he shared.
"Confidence is at the center of the relationship between a media organization and its public, especially for a national broadcasting corporation such as the BBC.
"This failing had the risk to damage the exceptionally strong degrees of confidence that audiences would have placed in a BBC factual programme about the Israel-Gaza war."
The programme was pulled from iPlayer in February after the boy's personal associations emerged, and in this past July an corporation's own inquiry concluded it infringed the broadcaster's journalistic standards on accuracy.
A BBC spokesperson said: "The Ofcom ruling is in accordance with the conclusions of Peter Johnston's review, that there was a significant failing in the programme in relation to the BBC's Editorial Guidelines on factual correctness, which aligns with clause 2.2 of the regulator's media standards.
"We issued an apology for this and we agree with the authority's determination in its entirety. We will follow the penalty as soon as the timing and wording are finalised."
