The Department of Labor has a standard for that most employers use to have an employee get his doctor to certify the need for FMLA. You can get a copy of that form at www.dol.gov. If you think your employer is asking for too much and interferring with your right to take FMLA, it may be worth getting a consultation with an attorney in your area. If your employer has already suspended you for any absence that should be covered under the FMLA, it may have already violated your rights. Wisconsin law and Federal law have significant protections and remedies for violations. Wisconsin law requires a complaint with the Equal Rights Division within 30 days. Federal FMLA claim must be filed in a court of competent jurisdiction within 2 years generally or within 3 if the violation is willful. Don't delay in filing a complaint if you think your rights were violated. I have included a link to our website for additional information on FMLA rights under Federal and Wisconsin law.