Forms may be printed or downloaded below or filled out in person when filing. Sole Proprietor form - Independent contractors MUST complete a Sole Proprietor form in addition to the PIP application.CONSULTANT shall submit to the COUNTY a monthly-itemized invoice for Services rendered during the prior month, or as otherwise set forth in Schedule B, and. Check only one of the following seven boxes. Payment shall be made upon submission of an invoice in a form acceptable to the DISTRICT. County of Orange, Virginia. The sole proprietor must complete Schedule 3 – Disclosure Information.