218.76  Improper invoice; resolution of disputes.--

(1)  In any case in which an improper invoice is submitted by a vendor, the local governmental entity shall, within 10 days after the improper invoice is received by it, notify the vendor that the invoice is improper and indicate what corrective action on the part of the vendor is needed to make the invoice proper.

(2)  In the event a dispute occurs between a vendor and a local governmental entity concerning payment of an invoice, such disagreement shall be finally determined by the local governmental entity as provided in this section. Each local governmental entity shall establish a dispute resolution procedure to be followed by the local governmental entity in cases of such disputes. Such procedure shall provide that proceedings to resolve the dispute shall be commenced not later than 45 days after the date on which the proper invoice was received by the local governmental entity and shall be concluded by final decision of the local governmental entity not later than 60 days after the date on which the proper invoice was received by the local governmental entity. Such procedures shall not be subject to chapter 120, and such procedures shall not constitute an administrative proceeding which prohibits a court from deciding de novo any action arising out of the dispute. If the dispute is resolved in favor of the local governmental entity, then interest charges shall begin to accrue 15 days after the local governmental entity's final decision. If the dispute is resolved in favor of the vendor, then interest shall begin to accrue as of the original date the payment became due.