Pay online property opens in new window, notify me, pay online, DPW services, e-codes, township meetings, documents. The Assessor's Office maintains the official real property mailing address records for Clark County.The form can be filled out and submitted in PDF format. Asset forfeiture payees are required to complete a valid Unified Financial Management System (UFMS) Vendor Request Form to receive payment. Who Must File a Personal Property Declaration with the Assessor? The Treasurer's Office has several payment options. 5.1​ Obligation to Pay.