Unfortunately, for this particular type of bond, a Series I US Savings Bond, they can only be purchased through TreasuryDirect or by way of a tax refund. Since

Unfortunately, for this particular type of bond, a Series I US Savings Bond, they can only be purchased through TreasuryDirect or by way of a tax refund. Since 2012, they are no longer sold through banks [1]. For regular Treasury Bills, Notes, and Bonds, buying through a broker is an option. But separately, it is a miracle that the author didn't hit the physical identity verification path [2] when signing up for the TreasuryDirect account. [1] https://treasurydirect.gov/timeline.htm?src=td&med=banner&loc=consumer https://treasurydirect.gov/timeline.htm?src=td&med=banner&lo... [2] https://money.stackexchange.com/questions/46840/treasury-direct-requires-medallion-for-verification-how-can-i-get-my-bank-to-do https://money.stackexchange.com/questions/46840/treasury-dir...