You would have to prove cause to fire without notice. Also, depending on the country, firing/layoffs can be difficult without cause (and often even with cause)

You would have to prove cause to fire without notice. Also, depending on the country, firing/layoffs can be difficult without cause (and often even with cause) (e.g. you can't layoff someone at will, you might need to prove that you have an economic downturn before downsizing). But this varies way more between countries as far as I know.