Bankruptcy courts have jurisdiction over "core" and "non-core" proceedings. See 28 U.S.C. § 157. In "core" proceedings, bankruptcy courts can enter final judgments. See 28 U.S.C. § 157(b). In "non-core" proceedings, however, bankruptcy courts must make findings of fact and conclusions of law and send their rulings to the district court for de novo review. See 28 U.S.C. § 157(c). 

Bankruptcy Court Holds Attorney's Signature on Proof of Claim Form Renders Attorney a Fact Witness to Allegations in Proof of Claim, Waiving Attorney-Client and Work-Product Privileges