FMLA and late certification: Can we fire for missed deadline?

Q. As the law requires, my company provides FMLA leave to employees, provided they submit medical certification forms completed by their health care providers, within 15 days. A late submission is grounds for discharge under the company’s employee absence policy. Health care providers being what they are, we frequently receive forms after the deadline. I have a problem employee out on FMLA leave again, who has not submitted a medical certification form within the 15-day deadline. What options are available to me as the employer? Will the employee be protected by the FMLA if I choose to discharge her for not providing the certification form in a timely manner? ...