Online Vendor Registration Application The Office of Contracting and Procurement is pleased to provide the capability of electronic (online) vendor registration for the purpose of identifying businesses and other organizations available to provide equipment, supplies or services. You will need the following information to register: TaxID/SSN, DUNS Number, and CBE Certification Number (if applicable). By completing this registration, your information is included in a vendor database that will be made available to contracting and procurement personnel in the Government of the District of Columbia. Message to Potential Vendors If you have not registered to do business with the District of Columbia government, please register here. If you would like to update your registration information please contact us via email. Please provide your TaxID/SSN, password, and the information that needs to be updated. You may review your business information here.