What notice is required before taking FMLA leave?
You must give at least 30 days notice before leave, if possible. If this is not possible, you must give notice as is practicable. You do not have to ask for FMLA leave by name. However, you need to tell your employer enough to know that the reason you need leave is covered by the FMLA. The burden is on the employer to figure out whether a leave request is a request for an FMLA-qualified leave. An employee who does not notify the employer of the need for FMLA leave cannot later claim that the employer denied him or her his or her rights under the Act.