Welcome to Vendor Self Service

Log in or register as a user to begin using Vendor Self Service

New Castle County Vendor Self-Service is a secure login site for new vendors to register and existing vendors to manage their information. The site is integrated with the New Castle County Financial System and allows vendors to:

  • Manage their information
  • Submit W-9 online
  • Receive notification of Bid opportunities
  • View and receive Purchase Orders online
  • View invoice information
  • Enter banking information in a secure format to receive payments quicker


The County strongly suggests all vendors to register. The registration guide for Existing vendors and New vendors will guide you through the completion of your company/individual profile and the selection of a username and password that will be used to manage your account in the future.

Please note, registration does not imply authorization to do business or that a contract is approved with New Castle County. All vendors must complete and sign a (W-9 form). Any registration that does not have a W-9 attached will not be activated.

If this is your first time visiting the site, you may register as a vendor by clicking on the "Registration" button.

Please contact VendorReg@newcastlede.gov or call 302-395-5250 with any questions or concerns.