The BBC was found to have committed a "serious breach" of media regulations by failing to disclose that the presenter of a documentary about the Gaza conflict was the son of a Hamas representative, as ruled by regulatory body Ofcom.
An probe by the media regulator into the programme Gaza: How to Survive a Warzone has found that the documentary was "substantially inaccurate".
The BBC's director general had previously apologised, saying there had been "a significant failing in relation to factual correctness".
Ofcom has instructed the broadcaster to broadcast a peak-time statement about its decisions.
"Given this constitutes a major infringement of our code, we are ordering the BBC to air a message of our determinations against it on the BBC's second channel at nine o'clock in the evening, with a timing to be determined," the statement read.
'Potential to Undermine Credibility'
The authority's statement declared: "Our investigation concluded that the documentary's omission to reveal that the narrator's male guardian occupied a position in the Hamas-run government was materially misleading.
"It meant that the audience did not have critical information which may have been extremely pertinent to their evaluation of the narrator and the information he presented.
"Confidence is at the center of the connection between a television network and its audience, particularly for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the possibility to undermine the exceptionally strong amounts of confidence that audiences would have placed in a BBC factual programme about the Israel-Gaza war."
The film was pulled from the BBC's streaming service in last February after the boy's personal associations were revealed, and in July an corporation's own inquiry found it violated the corporation's content policies on factual correctness.
A corporation official commented: "The regulator's decision is in accordance with the results of the internal assessment, that there was a significant failing in the programme in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to clause 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we comply with the authority's determination in full. We will follow the penalty as soon as the schedule and wording are determined."
