Approved reports can only be reimbursed by an Admin user. An approver, or a submitter won’t be able to access this feature.
When an Admin user chooses an approved report from the Approvals section, he will be presented with a Record Reimbursement button on top of the report. Clicking on the Record Reimbursement button will change the status of the report from Approved to Reimbursed.
Note: As of now, Zoho Expense supports only offline reimbursement.