The BBC was found to have committed a "serious breach" of industry standards by failing to disclose that the presenter of a programme about the Gaza situation was the child of a Hamas administrator, according to UK media regulator Ofcom.
An investigation by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has determined that the documentary was "significantly deceptive".
The BBC's director general had previously apologised, stating there had been "a serious error in relation to accuracy".
Ofcom has directed the broadcaster to transmit a prime-time declaration about its decisions.
"Since this amounts to a significant violation of our code, we are directing the broadcaster to broadcast a message of our findings against it on BBC Two at 21:00, with a date to be confirmed," the statement read.
'Potential to Undermine Confidence'
The watchdog's report said: "The inquiry we conducted determined that the documentary's omission to reveal that the narrator's male guardian occupied a position in the Hamas-run government was significantly deceptive.
"Consequently that the public did not have vital facts which may have been very significant to their assessment of the presenter and the information he presented.
"Trust is at the center of the bond between a broadcaster and its public, notably for a state-funded media outlet such as the public broadcaster.
"This failing had the risk to damage the very considerable levels of trust that viewers would have placed in a factual film from the broadcaster about the conflict in Gaza."
The programme was withdrawn from iPlayer in the month of February after the narrator's family links came to light, and in the month of July an broadcaster's internal assessment found it breached the organization's journalistic standards on accuracy.
A representative for the broadcaster stated: "The Ofcom ruling is in accordance with the findings of the corporation's inquiry, that there was a significant failing in the film in relation to the corporation's content standards on truthfulness, which aligns with clause 2.2 of the regulator's media standards.
"We have apologised for this and we agree with Ofcom's decision in its entirety. We will comply with the sanction as soon as the timing and wording are finalised."
