How can I change the name or mailing address on a bill?

The Treasurer/Collector's office cannot make changes to your invoice.  For Real Estate and Personal Property tax bills you will need to contact the Assessor's office.  For water bills please contact the Water Department.  Bill information for excise tax invoices comes from the Registry of Motor Vehicles.  Address changes must be done through them within 30 days of a move.  Your excise bill will be sent from the town in which you resided as of January 1.