"Indorsement" means a signature, other than that of a signer as maker, drawer, or acceptor, that alone or accompanied by other words is made on an instrument for the purpose of (i) negotiating the instrument; (ii) restricting payment of the instrument; or (iii) [...]

"Indorsement" means a signature that alone or accompanied by other words is made on a security certificate in registered form or on a separate document for the purpose of assigning, transferring, or redeeming the security or granting a power to assign, transfer, [...]