The phrase "a proper case for" is correct and usable in written English.
It can be used when discussing a situation or example that is suitable for a particular argument, action, or consideration.
Example: "This incident is a proper case for further investigation into the company's practices."
Alternatives: "an appropriate example for" or "a suitable instance for".
What Warren has done is to make a proper case for liberalism, which does not happen often enough.
The jurisdiction which I now exercise is wholly within the power of the Court, and being of opinion that it is a proper case for interfering, I shall leave nothing unsatisfied by the judgment I pronounce.
The sheer failure of business to make a proper case for itself, to explain the good it does, to describe how much worse off we'd be without it, is shocking – and depressing.
China's current control of the REE mineral market serves as a proper case study for identifying the causes and effects of limited access caused by a single dominant world producer.
Approximately half of the patients treated with antimalarial were blood smear negative, suggesting another undiagnosed cause of fever and the necessity of an improvement of clinical and laboratory diagnosis as well as training and supervision of health workers for a proper case management.
The council failed to make a proper political case for such radical change, argues Localis, a local government think-tank.Islington, a Labour-run council in London, has done plenty of that.
The normal matrix with this parameterization is highly ill-conditioned, which is the proper case study for investigating the performances of the Tikhonov regularization technique.
2b) Fear of decision making power being taken away means that it is now too late for a proper business case...threat of exposure.
You do not have to spend obscene amounts of money for a proper carrying case.
Improvement of clinical and laboratory diagnosis of malaria is crucial for proper case management and reliable data collection in the changing epidemiological setting.
A barrister is required to accept any case for a proper professional fee, for example, regardless of his personal feelings, except when there are circumstances of conflicting interests of clients.
