Code of Federal Regulations Title 31. Money and Finance–Treasury § 31.321.13 Cancellation of redeemed securities

A paying agent shall cancel each redeemed security by imprinting the word “PAID” on its face and entering the amount and date of the actual payment and the agent's name, location, and four-digit code number assigned by a TRS Site or nine-digit ABA code number. The recordation of this data shall constitute a certification by the agent that the security was redeemed in accordance with the provisions of this part, that the presenter's identity and entitlement to request payment were duly established, and that the proceeds were paid to the presenter or remitted to a TRS Site in payment for Series HH savings bonds.