The BBC committed a "serious breach" of broadcasting rules by not revealing that the presenter of a film about Gaza 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 determined that the programme was "significantly deceptive".
The chief executive of the broadcaster had already issued an apology, saying there had been "a major oversight in relation to factual correctness".
The regulator has ordered the corporation to transmit a prime-time announcement about its conclusions.
"Given this constitutes a serious breach of our regulations, we are ordering the broadcaster to broadcast a message of our conclusions against it on BBC Two at 9pm, with a date to be finalised," the regulator stated.
'Risk to Undermine Trust'
The regulator's announcement stated: "Our investigation concluded that the programme's failure to disclose that the narrator's parent held a position in the Hamas-run government was substantially inaccurate.
"It meant that the viewers did not have vital facts which may have been highly relevant to their judgment of the presenter and the information he provided.
"Trust is at the center of the connection between a media organization and its viewers, notably for a state-funded media outlet such as the public broadcaster.
"This oversight had the potential to undermine the very considerable amounts of confidence that audiences would have placed in a documentary produced by the BBC about the conflict in Gaza."
The film was removed from the BBC's streaming service in last February after the presenter's personal associations were revealed, and in the month of July an corporation's own inquiry concluded it infringed the broadcaster's content policies on truthfulness.
A representative for the broadcaster commented: "The authority's determination is in agreement with the results of the internal assessment, that there was a serious error in the documentary in relation to the corporation's content standards on truthfulness, which reflects regulation 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we comply with Ofcom's decision in complete. We will follow the sanction as soon as the schedule and wording are confirmed."
