Registered security
a security in registered form, meaning that ownership of the security is determined by entry in a register, rather than by mere possession the instrument. A registered share certificate is only evidence of ownership, but it can be trumped by the actual register.
Shares and securities conferring beneficial ownership of their issuer tend to be registered, because you need to know who your owner is, right? Debt securities — whcih by their nature do not confer any ownership rights on the holder, but merely represent a debt claim against the issuer, are often in bearer form, especially outside the United States.
Contrast with Bearer security.