Indiana Proof of Claim, Supplement 1 is a legal document used by creditors in the state of Indiana to make a claim against a debtor’s estate in bankruptcy court. Creditors must use this form when filing a proof of claim against a bankruptcy estate. It includes information about the creditor, the amount of the claim, and any security or collateral the creditor has for the claim. There are two types of Indiana Proof of Claim, Supplement 1: one for secured claims and one for unsecured claims. The secured claim form must include details about the collateral held by the creditor, while the unsecured claim form does not require such information.