Unclaimed Property How to Report Unclaimed Property The Unclaimed Property Unit encourages all businesses and financial institutions holding 25 or more listings of abandoned property to provide their report by diskette. This increases the efficiency of the reporting process for the unit and helps owners reclaim their property. All holder reports (diskette and paper) and remittances (made payable to the DC Treasurer) should be mailed to: DC Office of Finance and Treasury Unclaimed Property Unit 1275 K Street, NW, Suite 500-B Washington DC 20005 Filing Deadlines and Extensions Locating Property Owners Reporting Instructions and Forms