The BBC committed a "major breach" of media regulations by failing to disclose that the voice of a film about the Gaza situation was the offspring of a Hamas representative, according to UK media regulator Ofcom.
An inquiry by the media regulator into the programme Gaza: How to Survive a Warzone has found that the film was "significantly deceptive".
The head of the BBC had already issued an apology, stating there had been "a major oversight in relation to accuracy".
The authority has directed the BBC to broadcast a evening announcement about its decisions.
"As this represents a significant violation of our regulations, we are directing the broadcaster to air a announcement of our determinations against it on BBC Two at 21:00, with a timing to be finalised," the statement read.
'Possibility to Undermine Trust'
The authority's announcement declared: "Our probe determined that the programme's omission to reveal that the voice's male guardian served in a post in the Hamas-run government was significantly deceptive.
"It meant that the public did not have essential details which may have been very significant to their evaluation of the voice and the information he presented.
"Confidence is at the core of the relationship between a television network and its audience, particularly for a state-funded media outlet such as the BBC.
"This oversight had the possibility to erode the very considerable degrees of credibility that viewers would have put in a factual film from the broadcaster about the conflict in Gaza."
The documentary was withdrawn from the online platform in the month of February after the narrator's family links came to light, and in the month of July an corporation's own inquiry determined it infringed the broadcaster's journalistic standards on factual correctness.
A corporation official commented: "The regulator's decision is in line with the results of the internal assessment, that there was a serious error in the film in relation to the broadcaster's journalistic policies on accuracy, which corresponds to regulation 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we comply with the regulator's ruling in full. We will adhere to the penalty as soon as the date and wording are finalised."
