(a) Payment of a savings bond that has reached final maturity. We will purchase a zero-percent certificate of indebtedness in your TreasuryDirect ® account using the proceeds of a matured savings bond.

(b) Payments of interest and principal (except a savings bond that has reached final maturity). (1) We provide two methods of receiving payments of principal and interest:

(i) Payment to your account at a financial institution by the ACH method, or

(ii) Payment to your TreasuryDirect account to purchase a zero-percent certificate of indebtedness.

(2) You may select different payment destinations for principal and interest for a marketable Treasury security. You may change your payment destination at any time, unless the security is in the closed book period. (See § 363.210.)

(3) If we are unable to deliver a payment, we will use the payment to purchase a zero-percent certificate of indebtedness in your TreasuryDirect account.