It depends on the state and the company's policy. In states without mandatory paid sick leave laws, employers generally can require a doctor's note for any absence, including a single day. In many states with paid sick leave laws, requiring a note for absences under 3 consecutive days is strictly forbidden. The ADA and FMLA add further limits.
State sick leave laws and the 3-day rule
- States that restrict notes for short absences (typically under 3 consecutive days): Washington, Oregon, New York, New Jersey, Arizona, Colorado, Connecticut, Maryland, Michigan, Minnesota, and others. California has no statutory 3-day rule, but the Labor Commissioner has indicated that requiring a note as a condition of using statutory paid sick leave can itself be unlawful. Thresholds vary.
- States with no mandatory sick leave law: the employer sets its own documentation rules in the handbook
- Where a note can be required, the employer may ask only for confirmation that the employee was seen and is cleared to return, not for a diagnosis
- The employer's own handbook is binding. When policy says "notes required after 3 days," demanding one for a 1-day absence without updating the policy is not valid. Companies who’re writing their handbook typically consider sick leave days as part of their broader paid time off accrual policy.
Federal limits: ADA and FMLA
The EEOC advises that medical inquiries must be job-related and consistent with business necessity. For a single sick day, asking for a note is generally permissible, but repeated requests tied to a suspected disability may become an impermissible disability-related inquiry.
FMLA applies to employers with 50+ employees. For FMLA-qualifying absences, the employer can require medical certification on the standardised DOL form. For a single non-FMLA sick day, FMLA certification does not apply.
What to do instead
- Set a clear written policy: specify when a note is required (for example, absences of 3 or more consecutive days), and apply it consistently
- Check the state's sick leave rules before enforcing a note requirement
- Request confirmation of the visit and fitness to return only, not a diagnosis
- Apply the policy uniformly. Requiring a note from one employee but not another in similar circumstances invites discrimination claims
Disclaimer:
This article informs. It does not advise on the law. State and local sick-leave rules vary. Check what applies where you operate.
TL;DR
- In states with paid sick leave laws, requiring a doctor's note for a single day is often prohibited; Washington, Oregon, New York, and others restrict notes for absences under 3 days.
- In states without sick leave mandates, employers generally can require a note for any absence.
- ADA limits what can be asked. Companies typically request confirmation of the visit only, and not a diagnosis.