Dear …
RE: Employment Termination
Your employment with __(name of organization)__ has been terminated effective immediately.
Despite the warnings you have been given, it is evident that absenteeism has become a habitual pattern with you. While __(Name of Organization)__ acknowledges that employees do require occasional time off for sickness a/o personal reasons, the number of acceptable absentee days are limited to __(#)__ per __(calendar year/month/etc.)__, which has been clearly communicated to you. Over the past __(length of time)__, you have been absent __(#)__ days.
This type of abuse has never been, and will never be tolerated at __(name of organization)__. You are, therefore, required to leave your __(station/desk/etc.)__ at once. Arrangements to retrieve any personal belongings located on these premises will be made with you at a later date. Enclosed, you will find all the appropriate employment termination documentation and your final pay.
Yours truly,