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Welcome to Vendor Self Service

Barnstable County Vendor Self Service grants online access to view invoices and 1099 data,track payment processing and check issuance. Vendors can also maintain and update general business information from this web portal. To access these enhanced services and to remain an active vendor with the County, please click the register button to the right to complete the online registration process. If you have done business with the County before please be sure to have your vendor number and register as an existing vendor.

If you need your login information or have general questions, please email accounts.payable@barnstablecounty.org, purchasing questions, please email purchasing@barnstablecounty.org and banking information questions, please email treasury@barnstablecounty.org

Registration process takes 1-5 business days to finalize upon receipt of a completed, correct and signed W-9. For a blank W-9 form, visit IRS Website for the most recent version.

View our PO terms & conditions