Wis. Stat. § 126.21: Grain producer obligations.

(1) Delivery per contract. No grain producer or producer agent who contracts to sell and deliver grain to a grain dealer at an agreed price may wrongfully refuse to deliver that grain according to the contract.

(2) Disclosure of liens and security interests. A grain dealer procuring grain from a grain producer or producer agent may require the grain producer or producer agent to disclose any liens or security interests that apply to the grain. The grain dealer may require the disclosure in writing. The grain dealer may require the grain producer or producer agent to specify the nature and amount of each lien or security interest and the identity of the person holding that lien or security interest. No grain producer may falsify or fraudulently withhold information required under this subsection in order to sell grain.