Wis. Stat. § 218.0126
A claim made by a franchised motor vehicle dealer for promotional allowances or other incentive payments shall be either approved or disapproved within 30 days after the claim is submitted to the manufacturer, importer or distributor in the manner and on the forms the manufacturer, importer or distributor reasonably prescribes. An approved claim shall be paid within 30 days after its approval. If a claim is not specifically disapproved in writing or by electronic transmission within 30 days after the date on which the manufacturer, importer or distributor receives it, the claim shall be considered to be approved and payment shall follow within 30 days after approval. A manufacturer, importer or distributor retains the right to audit a claim for a period of 2 years after the date on which the claim is paid and to charge back any amounts paid on claims that are false or unsubstantiated. If there is evidence of fraud, this section does not limit the right of the manufacturer to audit for longer periods and charge back for any fraudulent claim, subject to the limitations period under s. 893.93(1) (cm).
Wis. Stat. § 218.0126