The BBC committed a "significant breach" of industry standards by omitting to mention that the presenter of a film about the Gaza situation was the offspring of a Hamas official, according to British broadcasting authority Ofcom.
An probe by Ofcom into the documentary titled Gaza: How to Survive a Warzone has found that the programme was "materially misleading".
The chief executive of the broadcaster had already issued an apology, stating there had been "a serious error in relation to accuracy".
Ofcom has ordered the BBC to transmit a evening statement about its findings.
"Given this constitutes a significant violation of our rules, we are ordering the corporation to transmit a statement of our findings against it on BBC Two at nine o'clock in the evening, with a date to be finalised," the regulator stated.
'Potential to Undermine Trust'
The regulator's report said: "Our investigation concluded that the film's omission to reveal that the narrator's male guardian occupied a role in the Hamas-run administration was substantially inaccurate.
"This implied that the public did not have critical information which may have been extremely pertinent to their evaluation of the voice and the information he shared.
"Confidence is at the center of the connection between a broadcaster and its viewers, especially for a national broadcasting corporation such as the BBC.
"This oversight had the potential to undermine the exceptionally strong amounts of confidence that viewers would have placed in a BBC factual programme about the conflict in Gaza."
The film was removed from the online platform in February after the presenter's family links were revealed, and in July an internal BBC review found it breached the organization's journalistic standards on accuracy.
A corporation official said: "The regulator's decision is in line with the findings of the corporation's inquiry, that there was a significant failing in the film in relation to the broadcaster's journalistic policies on factual correctness, which corresponds to Rule 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept the authority's determination in its entirety. We will adhere to the sanction as soon as the schedule and language are finalised."
