The public service broadcaster was found to have committed a "major breach" of industry standards by not revealing that the voice of a documentary about the Gaza conflict was the offspring of a Hamas representative, as determined by regulatory body Ofcom.
An inquiry by the media regulator into the documentary titled 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 significant failing in relation to factual correctness".
The regulator has directed the BBC to broadcast a peak-time statement about its decisions.
"Given this constitutes a serious breach of our rules, we are ordering the BBC to transmit a message of our findings against it on the BBC's second channel at nine o'clock in the evening, with a timing to be finalised," it said.
'Possibility to Erode Confidence'
The authority's announcement declared: "The inquiry we conducted determined that the programme's omission to reveal that the voice's father occupied a role in the Hamas-run authority 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 information he shared.
"Trust is at the heart of the bond between a broadcaster and its viewers, particularly for a state-funded media outlet such as the public broadcaster.
"This oversight had the possibility to undermine the significantly high levels of trust that the public would have put in a documentary produced by the BBC about the conflict in Gaza."
The programme was withdrawn from the BBC's streaming service in the month of February after the presenter's personal associations emerged, and in this past July an internal BBC review concluded it breached the corporation's editorial guidelines on factual correctness.
A BBC spokesperson said: "The authority's determination is in agreement with the findings of the corporation's inquiry, that there was a serious error in the documentary in relation to the corporation's content standards on accuracy, which reflects regulation 2.2 of the regulator's media standards.
"We issued an apology for this and we accept Ofcom's decision in its entirety. We will follow the sanction as soon as the timing and wording are confirmed."
