31 CFR § 359.28
Are taxpayer identification numbers (TINs) required for the registration of definitive Series I savings bonds?
July 31, 2023
§ 359.28 Are taxpayer identification numbers (TINs) required for the registration of definitive Series I savings bonds?
The registration of a definitive Series I savings bond must include the TIN of the owner or first-named coowner. If the bond was purchased as a gift or award and the owner's TIN is not known, the TIN of the purchaser must be included in the registration of the bond.
[71 FR 46857, Aug. 15, 2006, as amended at 76 FR 66856, Oct. 28, 2011]