The FMLA’s notice provision requires employees, to be eligible for FMLA leave, to let their employers know that they suffer from a serious health condition. Merely telling a supervisor “I’m sick” doesn’t cross to the threshold of a legitimate FMLA notice. But it’s important for supervisors to know that employees, on the other hand, don’t need to say something as explicit as “I need FMLA leave because I have X illness” …