The BBC was found to have committed a "significant breach" of industry standards by omitting to mention that the presenter of a film about Gaza was the child of a Hamas official, as determined by regulatory body Ofcom.
An inquiry by the broadcasting watchdog into Gaza: How to Survive a Warzone has determined that the documentary was "substantially inaccurate".
The head of the BBC had earlier expressed regret, saying there had been "a significant failing in relation to truthfulness".
The authority has instructed the corporation to transmit a peak-time statement about its conclusions.
"Given this constitutes a major infringement of our rules, we are ordering the corporation to broadcast a announcement of our findings against it on BBC2 at nine o'clock in the evening, with a timing to be confirmed," it said.
'Possibility to Undermine Confidence'
The watchdog's report stated: "Our probe concluded that the film's failure to disclose that the narrator's father held a post in the Hamas-controlled government was substantially inaccurate.
"Consequently that the audience did not have vital facts which may have been highly relevant to their evaluation of the narrator and the content he provided.
"Trust is at the center of the bond between a broadcaster and its public, particularly for a national broadcasting corporation such as the public broadcaster.
"This error had the risk to undermine the very considerable degrees of confidence that the public would have placed in a factual film from the broadcaster about the Israel-Gaza war."
The film was removed from iPlayer in February after the boy's personal associations were revealed, and in this past July an broadcaster's internal assessment determined it breached the organization's editorial guidelines on accuracy.
A BBC spokesperson commented: "The Ofcom ruling is in accordance with the results of the internal assessment, that there was a serious error in the film in relation to the corporation's content standards on accuracy, which reflects 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 directive as soon as the date and language are confirmed."
