ISIN.net can assist with your book entry needs.
Book-Entry: An overwhelming majority (over 99%) exist in book-entry form. Securities in book-entry form exist not as printed certificates but as computer records on our books and on the books of banks and government securities brokers and dealers. Book-entry securities first became available in 1968. Since 1986, we have issued marketable securities in book-entry form only.
Bearer: A small percentage (less than 1%) exist in bearer form. A bearer security is a printed certificate with interest coupons attached. A bearer security does not contain the name of the owner and we don’t keep records of ownership. Title to a bearer security passes on delivery. We make interest and principal payments to the presenter of the interest coupons and certificate. We discontinued the issuance of bearer securities in 1982.
Registered: Less than 1% of outstanding marketable securities exist in registered form. A registered security is a printed certificate with the name of the owner stated on the face of the security. We maintain records of ownership and issue semiannual interest payments to the owner of record. Only the owner may submit the registered security at maturity for payment. The owner can transfer his or her registered security by filling out an assignment form on the back of the certificate. We adjust our ownership records to show transfers. We discontinued the issuance of registered securities in 1986.
There are three systems in which investors can hold marketable book-entry Treasury bills, notes, and bonds: