Book-Entry Securities

Securities that are recorded in electronic records called book entries rather than as paper certificates.

Also referred to as "book-entry receipt."

Investopedia Says:
Ownership of U.S. government book-entry securities is transferred over fedwire.

Securities that are not represented by a certificate. Purchases and sales of some municipal bonds, for instance, are merely recorded on customers' accounts; no certificates change hands. This is increasingly popular because it cuts down on paperwork for brokers and leaves investors free from worry about their certificates. See also Certificateless Municipals.

Security represented by an account entry on the records of a private depository or, in the case of U.S. Government securities, a Federal Reserve Bank, instead of a paper certificate. Nearly all Treasury securities are issued in book entry form, as are one-third of municipal bonds. Bank entry securities are less vulnerable to theft, can't be counterfeited, and don't require accounting or recording by certificate number. Also, owners don't have to worry about clipping coupons to collect bond interest payments.