To receive the original reporting documents you need to:
Log in to "Manage your account → Contract → Notifications and mail campaigns → Reporting documents" and put mark "Send original bills".
For receiving the original invoices and reports you will be required to put mark "Send invoices and reports".
For the agreements with individuals marks "Send original bills" and "Send invoices and reports" are unavailable. If required, the documents are sent upon customer's request.