D Hirschi

This is an easy solution. You are having a problem with the employee not being there. Let me also clarify, this is not a medical issue. This is an attendance issue.

Would you let another employee of yours miss that many days?

I have had problems like this before. Basically, it puts an undue hardship on your current employees, they have to do more, and carry the weight more often. What do you have in your employee handbook on leave/sick leave? Follow those rules you already have set up.

Just track the undue hardship, in my case I could prove that the current employees had to do more work that what they would normally had to do. It was also making our customers wait longer to get helped.