Vendor ACH Registration


In conjunction with best practices and in response to ACH fraud schemes, Washington County, WI does not provide the ACH sign-up form online. Please email us to request one at

Please complete all information requested on the form. The accuracy of the information provided is very important. Please confirm the information with your financial institution.

The form authorizes Washington County to process your payment via ACH. If the County finds it necessary, we may also initiate debit entries and/or adjustments for any credit entries made in error. Debit entries and adjustments will be performed with prior notice to payee.

FAQ - ACH Authorization and Payments (PDF)

These instructions relate to the ACH process for Washington County, Wisconsin vendors and cannot be used for Washington County Employees payroll direct deposit sign-up/changes.