The BBC was found to have committed a "serious breach" of industry standards by not revealing that the narrator of a film about Gaza was the offspring of a Hamas official, 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 "materially misleading".
The chief executive of the broadcaster had already issued an apology, saying there had been "a major oversight in relation to accuracy".
The authority has ordered the corporation to transmit a peak-time statement about its decisions.
"As this represents a major infringement of our regulations, we are instructing the broadcaster to transmit a announcement of our determinations against it on BBC2 at nine o'clock in the evening, with a timing to be finalised," it said.
'Risk to Undermine Confidence'
The authority's statement declared: "The inquiry we conducted determined that the programme's omission to reveal that the presenter's parent held a position in the Hamas-administered government was significantly deceptive.
"This implied that the audience did not have vital facts which may have been highly relevant to their assessment of the presenter and the information he presented.
"Confidence is at the center of the bond between a television network and its viewers, especially for a national broadcasting corporation such as the public broadcaster.
"This error had the possibility to undermine the exceptionally strong levels of trust that audiences would have placed in a documentary produced by the BBC about the Gaza conflict."
The film was pulled from iPlayer in last February after the presenter's family links were revealed, and in the month of July an broadcaster's internal assessment concluded it violated the corporation's content policies on accuracy.
A corporation official said: "The Ofcom ruling is in agreement with the results of the corporation's inquiry, that there was a major oversight in the film in relation to the BBC's Editorial Guidelines on accuracy, which aligns with regulation 2.2 of the regulator's media standards.
"We issued an apology for this and we accept the authority's determination in its entirety. We will adhere to the penalty as soon as the date and wording are confirmed."
