The phrase "an unprecedented case" is correct and usable in written English.
It can be used to describe a situation or event that has never happened before or is unlike anything that has occurred in the past.
Example: "The court was faced with an unprecedented case that challenged existing legal precedents."
Alternatives: "a unique situation" or "an unparalleled instance".
"If you think of it more broadly in that way, this isn't an unprecedented case".
"This is an unprecedented case," said Carmen Enríquez, who was national television's royals correspondent for almost two decades and has written three books on the royal family.
If the Governor has an alternative vision for how diplomats might have better handled such an unprecedented case, he has yet to grace us with it.
A 54-year-old man has admitted sexually abusing more than 100 mentally disabled children and adults in care homes in Switzerland and Germany during almost three decades, in what the Swiss police described Tuesday as an unprecedented case.
The Extraordinary African Chambers, a special international criminal tribunal set up in Senegal by the African Union, is trying the former leader of Chad, in an unprecedented case of one African country holding the ruler of another responsible for crimes.
Theirs was an unprecedented case, exposed by the now defunct News of the World, and everyone in the game must hope the outcome reverberates around every dressing room in the world, not just those containing Pakistan cricketers.
This was a rare, almost unprecedented, case of a government prosecution of a whistleblower ending in total defeat and failure.
DCI Martin Holvey, of the East Midlands major crime unit, said: "This has been a rare and unprecedented case and everybody who has listened to the details as they have emerged throughout the trial will, I am sure, have felt the same sense of shock and disbelief.
Last week she wrote a 22-page decision denying a motion to dismiss the unprecedented case.
The Sangji incident sparked an unprecedented criminal case against UC and Sangji's lab chief, chemistry professor Patrick Harran.
"In this respect, the UH lab explosion is similar to the explosion at Texas Tech University [that maimed graduate student Preston Brown] and the fire at [UC Los Angeles]" that caused the death of lab assistant Sheharbano "Sheri" Sangji and sparked an unprecedented criminal case against UC and chemistry professor Patrick Harran.
