Dear Fanny, In the case of Sick Leave. It should be properly communicated to respective person(HR) in writting. Ecery sick leave should be supported by the medical certificate. it is as per law. In case of employees availing the sick leave very freqvently then you can ask the employee to produce treatment details certified by doctor. by this way you will have an idea how much time employee will take to recover. For authentication purpose of the certificates and reports, you can cross check with the doctor who had issued the certificate. In most of the companies in house or visiting doctors are there. If this is not the case with your company, you can hire a visiting doctor, who will check the certificates and other dcuments. By this you can ask the employees to first consult with the company's doctor and if he suggests then you can go for Sick leave. In case of faiure to produce the certificate, you can consider it as a unpaid leave. and if the unpaid leave is more than 10 a month without approval then you can terminate the employee. It is always a policy of new hiring that company should ask the medical checkup of the employee, to prevent this kind of activities. If you dont have such policy, you can amend it and ask the curret employees to go for medical check up. (charges should be bear by company). For taking action in this regards. You have to talk to employee in person. even if the same thing is continued, sen him / her a worring letter stating the issue and the policy against it. and you know what to do next if employee is on same track........