Dozens of property owners are coming out to dispute their new tentative valuation amount with the Allen County Auditor's Office. Informal hearings with the auditor's office started today and continue on Wednesday. Every three years, the state requires that property values be re-evaluated. The amount is determined by what properties around you are going for on the open market. You do have the chance to dispute your new valuation, and you need to bring documentation to back up your case.