[Code of Federal Regulations] [Title 31, Volume 2] [Revised as of July 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 31CFR363.135] [Page 495] TITLE 31--MONEY AND FINANCE: TREASURY CHAPTER II--FISCAL SERVICE, DEPARTMENT OF THE TREASURY PART 363_REGULATIONS GOVERNING SECURITIES HELD IN TREASURYDIRECT--Table of Contents Subpart D_Certificate of Indebtedness Sec. 363.135 In what form is a certificate of indebtedness issued? A certificate of indebtedness is issued in electronic form only in the TreasuryDirect[supreg] system.