I need a statement about calling in when an emlpoyee is absent. I have people off sick and do not call in on a daily bases. what kind of statement (such as expectation) do I develope to encourage these employees to call in and let us know that they

I need a statement about calling in when an emlpoyee is absent. I have people off sick and do not call in on a daily bases. what kind of statement (such as expectation) do I develope to encourage these employees to call in and let us know that they will not be in the office that day. And get them call in prior to the regular work schedule