Wisconsin Proof of Claim, Supplement 2 is a document used by creditors in the State of Wisconsin to file a lien against the property of a debtor. The form must be filled out and submitted to the circuit court in the county where the debtor resides. It is important to note that the Wisconsin Proof of Claim, Supplement 2 must be used in conjunction with the standard Proof of Claim form. There are two types of Wisconsin Proof of Claim, Supplement 2: one for secured creditors, and one for unsecured creditors. The form for secured creditors must be filed with a copy of the security agreement, and the form for unsecured creditors must be filed with a statement of the amount of the claim and the information necessary to identify the debtor.