A reminder that the second installment of the 2009 Real Estate Taxes is due by July 31, 2010. Payments should be made payable and mailed to: Fond du Lac County Treasurer PO Box 1515 Fond du Lac WI 54936-1515 A postmark (not metered mail) will determine timely payments. Include a self-addressed, stamped envelope if a payment receipt is requested. The County Treasurer's Office is located in the City-County Government Center 160 South Macy St. Office hours are Monday through Friday from 8:00 a.m to 4:30 p.m.