Colorado Notice of Filing Proof Of Claim is a document that is filed with the Colorado District Bankruptcy Court when a creditor of a debtor has a claim that needs to be resolved in a bankruptcy case. This document provides notification to the court, debtor, and other creditors concerning the filing of the claim. The creditor must provide the court and other parties with the necessary information in order to receive payment of their claim. There are two types of Colorado Notice of Filing Proof Of Claim: secured and unsecured. Secured claims are those that are backed by collateral or other security, and unsecured claims are those that are not backed by collateral.