If an absent employee has a return-to-work plan provided through the Fit for Work service, does he or she also have to provide the employer with a fit note?

No. Employers can take a return-to-work plan from the Fit for Work service as evidence equivalent to a fit note for the purposes of statutory sick pay entitlement. An employee will need to provide a fit note to the employer if he or she is discharged from the Fit for Work service before returning to work, or if the employee does not consent to the return-to-work plan being disclosed to the employer.