Please fill out and print form, and attach supporting documentation. Assessors' Handbook Section 506, Property Tax Audits and Audit.How to Write a Confirmation Letter with. The Contra Costa County Assessor's Office is recruiting to fill an Auditor-Appraiser I vacancy. Click on the topics below to get clear and accurate information in response to some of the most common questions about elections. Any action relating to this Contract shall be instituted and prosecuted in the courts of Contra Costa. County, State of California. The Contra Costa County Assessor's Office is recruiting to fill an Auditor-Appraiser I vacancy. Grants are limited to qualified nonprofit organizations located in or directly serving residents of Contra Costa County, California. Any action relating to this Contract shall be instituted and prosecuted in the courts of Contra Costa.