Ad Valorem Tax Certificates Are Tax Liens Subject to Anti-Modification under 511 Journal Issue: Sep 2014 Bankruptcy Code: 511, 724, 1129 Bankruptcy Rule: none, 2014 Topic Tags: Plan Confirmation, Bankruptcy Taxation, Govt. Claims/Sovereign Immunity, Real Estate Informal Proof of Claim Form or Substance Journal Issue: Jun 2005 Bankruptcy Rule: 2005, none, 9006 Topic Tags: Practice and Procedure