31 CFR § 359.4
In what form are Series I savings bonds issued?
July 31, 2023
§ 359.4 In what form are Series I savings bonds issued?
Series I savings bonds are issued in book-entry form. Effective January 1, 2012, Treasury discontinued the issuance of definitive Series I savings bonds.
[76 FR 66856, Oct. 28, 2011]