blackjack17:
Most policies with unlimited still allow the employer to request a medical certificate. Less than 3 days at the employer's cost, 3 or more at the employee's expense.
Without looking it up to confirm, I'm pretty sure that's the law.
So ... I ask for a Dr's certificate at company's expense, they can't get an appointment for a few days. By then they are feeling better and these days it's probably a phone consult anyway. They describe their alleged symptoms of three days ago to the Doc and get a cert. Serial absentees know all the tricks.... if only they applied themselves with equal fervour and resourcefulness to working.