Del. Code Ann. tit. 6, § 8-403
(b) If a certificated security in registered form is presented to an issuer with a request to register transfer or an instruction is presented to an issuer with a request to register transfer of an uncertificated security after a demand that the issuer not register transfer has become effective, the issuer shall promptly communicate to (i) the person who initiated the demand at the address provided in the demand and (ii) the person who presented the security for registration of transfer or initiated the instruction requesting registration of transfer a notification stating that:
(d) An issuer is not liable to a person who initiated a demand that the issuer not register transfer for any loss the person suffers as a result of registration of a transfer pursuant to an effective endorsement or instruction if the person who initiated the demand does not, within the time stated in the issuer’s communication, either: