The BBC was found to have committed a "major breach" of broadcasting rules by failing to disclose that the voice of a programme about the Gaza situation was the offspring of a Hamas administrator, according to regulatory body Ofcom.
An investigation by the media regulator into the programme Gaza: How to Survive a Warzone has determined that the programme was "substantially inaccurate".
The head of the BBC had earlier expressed regret, stating there had been "a significant failing in relation to accuracy".
The authority has instructed the corporation to transmit a evening statement about its decisions.
"As this represents a serious breach of our code, we are directing the corporation to air a announcement of our determinations against it on BBC Two at 9pm, with a date to be determined," the regulator stated.
'Risk to Undermine Trust'
The authority's statement said: "Our probe determined that the film's omission to reveal that the narrator's parent served in a post in the Hamas-administered government was significantly deceptive.
"It meant that the audience did not have essential details which may have been very significant to their assessment of the narrator and the details he shared.
"Confidence is at the center of the connection between a broadcaster and its viewers, particularly for a national broadcasting corporation such as the public broadcaster.
"This error had the possibility to erode the exceptionally strong levels of credibility that the public would have placed in a factual film from the broadcaster about the Gaza conflict."
The programme was removed from the BBC's streaming service in February after the boy's familial connections came to light, and in July an corporation's own inquiry determined it violated the organization's editorial guidelines on factual correctness.
A corporation official said: "The Ofcom ruling is in agreement with the results of Peter Johnston's review, that there was a significant failing in the programme in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to Rule 2.2 of the regulator's media standards.
"We issued an apology for this and we comply with Ofcom's decision in complete. We will adhere to the penalty as soon as the timing and wording are confirmed."
