Wisconsin Five-Day Rule Letter Fillable Form Letter is a type of document used to notify an employer of the employee's intent to take family or medical leave under the Wisconsin Family and Medical Leave Act (WF MLA). The letter must be sent to the employer five days prior to the start of the leave period. This document contains a formal letter template, complete with the employee's contact information, the date of the letter, the purpose of the letter, the name and address of the employer, and the period of the requested leave. There are two different types of Wisconsin Five-Day Rule Letter Fillable Form Letter, one for requesting unpaid leave and one for requesting paid leave. Both types contain the same information, but the paid leave letter also includes the employee's salary details and the amount of leave requested.