Fill out application form completely. If questions are not applicable, enter "NA.Your work history must indicate that you have experience with all the ISC otherwise you do not screen in. Make sure the application is complete. Return completed certifications to the employee to provide to his or her employer. There are five DOL optional-use FMLA certification forms. 24 hrs to a week should be the longest. Reality is it can take up to 2 weeks. Customarily, in the US, it is three days. However, it is not a legal standard.