55. A purchaser has control of a certificated security that is in bearer form if the certificated security is delivered to the purchaser. A purchaser has control of a certificated security that is in registered form if the certificated security is delivered to the purchaser and the security certificate is endorsed to the purchaser or in blank by an effective endorsement or is registered in the name of the purchaser at the time of the original issue or registration of transfer by the issuer.