The BBC committed a "major breach" of industry standards by failing to disclose that the voice of a film about the Gaza situation was the offspring of a Hamas administrator, as ruled by British broadcasting authority Ofcom.
An probe by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the film was "materially misleading".
The chief executive of the broadcaster had already issued an apology, stating there had been "a major oversight in relation to truthfulness".
Ofcom has instructed the broadcaster to transmit a evening statement about its findings.
"Given this constitutes a major infringement of our regulations, we are ordering the corporation to broadcast a announcement of our conclusions against it on BBC Two at nine o'clock in the evening, with a schedule to be determined," the regulator stated.
'Potential to Erode Credibility'
The regulator's report declared: "Our investigation concluded that the programme's omission to reveal that the voice's parent held a post in the Hamas-run authority was substantially inaccurate.
"Consequently that the audience did not have essential details which may have been very significant to their assessment of the narrator and the content he presented.
"Credibility is at the core of the relationship between a television network and its viewers, notably for a national broadcasting corporation such as the public broadcaster.
"This oversight had the potential to damage the exceptionally strong amounts of trust that viewers would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The documentary was withdrawn from iPlayer in the month of February after the presenter's familial connections were revealed, and in July an broadcaster's internal assessment concluded it infringed the corporation's content policies on truthfulness.
A corporation official said: "The regulator's decision is in agreement with the results of the internal assessment, that there was a serious error in the programme in relation to the corporation's content standards on accuracy, which corresponds to Rule 2.2 of the regulator's media standards.
"We have apologised for this and we agree with the authority's determination in its entirety. We will follow the penalty as soon as the schedule and language are confirmed."
