The BBC engaged in a "significant breach" of media regulations by omitting to mention that the presenter of a documentary about the Gaza conflict was the child of a Hamas representative, as ruled by regulatory body Ofcom.
An investigation by the broadcasting watchdog into Gaza: How to Survive a Warzone has concluded that the documentary was "materially misleading".
The BBC's director general had earlier expressed regret, stating there had been "a serious error in relation to accuracy".
The regulator has instructed the corporation to air a evening statement about its decisions.
"Since this amounts to a major infringement of our rules, we are ordering the broadcaster to transmit a message of our determinations against it on BBC2 at 21:00, with a timing to be determined," the statement read.
'Risk to Erode Trust'
The regulator's report declared: "Our investigation determined that the documentary's lack of disclosure that the narrator's parent held a position in the Hamas-run government was significantly deceptive.
"It meant that the audience did not have essential details which may have been very significant to their evaluation of the narrator and the details he presented.
"Confidence is at the core of the bond between a television network and its public, especially for a national broadcasting corporation such as the public broadcaster.
"This failing had the potential to erode the very considerable amounts of confidence that audiences would have invested in a factual film from the broadcaster about the Israel-Gaza war."
The film was withdrawn from the online platform in last February after the narrator's familial connections were revealed, and in July an internal BBC review found it infringed the corporation's content policies on accuracy.
A representative for the broadcaster commented: "The authority's determination is in accordance with the results of the internal assessment, that there was a significant failing in the film in relation to the broadcaster's journalistic policies on accuracy, which aligns with regulation 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we accept Ofcom's decision in full. We will follow the directive as soon as the schedule and wording are determined."
