[D13Fd]

> It has to be valid

It doesn’t have to be valid. You can fire someone because you don’t like them, or for no reason at all.

You just can’t fire them for a prohibited reason, such as race, age over 40, sex, disability etc.

Needing a reason is more of a practical problem - every person is a member of at least two protected classes (everyone has a race and sex). If you have no reason for firing a person, it’s often pretty easy for them to argue it was really based on a protected characteristic.

[snapetom]

No, there has to be a reason to determine unemployment benefit eligibility.

No smart company will ever put down "don't like them" or something more PC like, "culture misalignment." That's an invitation for legal issues. They're going to tie it back to performance as much as they can, and that takes time and effort.