How much time does an employee have to provide me with medical documentation for a reasonable accommodation?

Unfortunately, neither the Americans with Disabilities Act (ADA) nor the California Fair Employment and Housing Act (FEHA) have a specific time limit for the employee to provide medical documentation to support a request for reasonable accommodation. This often leaves employers wondering how long they must wait, and whether they must begin the requested accommodation before receiving documentation. There are no easy answers to these questions.

Many employers choose to apply the timelines from the family leave laws, which require that an employer allow at least 15 days to return a certification, and then provide extra time if the employee is unable to obtain it for reasons beyond their control.