The BBC committed a "significant breach" of media regulations by omitting to mention that the narrator of a film about the Gaza situation was the son of a Hamas representative, as determined by UK media regulator Ofcom.
An inquiry by the broadcasting watchdog into Gaza: How to Survive a Warzone has found that the documentary was "substantially inaccurate".
The chief executive of the broadcaster had already issued an apology, stating there had been "a significant failing in relation to truthfulness".
The regulator has ordered the broadcaster to transmit a prime-time statement about its conclusions.
"As this represents a serious breach of our code, we are instructing the corporation to broadcast a message of our conclusions against it on BBC Two at 21:00, with a date to be confirmed," the regulator stated.
'Possibility to Damage Trust'
The authority's announcement said: "Our investigation concluded that the film's failure to disclose that the voice's male guardian occupied a role in the Hamas-controlled authority was significantly deceptive.
"This implied that the audience did not have essential details which may have been very significant to their assessment of the narrator and the details he provided.
"Confidence is at the core of the relationship between a broadcaster and its public, particularly for a state-funded media outlet such as the BBC.
"This oversight had the possibility to damage the exceptionally strong amounts of trust that audiences would have placed in a BBC factual programme about the Israel-Gaza war."
The film was withdrawn from the BBC's streaming service in the month of February after the boy's familial connections were revealed, and in this past July an broadcaster's internal assessment concluded it infringed the corporation's content policies on truthfulness.
A representative for the broadcaster stated: "The regulator's decision is in accordance with the results of Peter Johnston's review, that there was a significant failing 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 issued an apology for this and we comply with Ofcom's decision in its entirety. We will comply with the penalty as soon as the schedule and language are finalised."
