In some situations, such as an accident to a family member, a previously undiagnosed illness causing a medical emergency, or premature labor, you either may not be able to give advance notice or take leave according to the schedule you had originally planned. In these situations, you cannot be denied leave on the basis of inadequate notice as long as you give notice "as soon as practicable." This means that you should give notice within one or two business days of learning of the need for leave if you will not be returning to work immediately. If you return to work without having previously given notice that your leave was for FMLA reasons, you should notify your employer within two business days that you were absent for FMLA-eligible reasons and that you would like your leave designated as FMLA leave.