Mo. Rev. Stat. § 400.8-401: Duty of issuer to register transfer.

(a) 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, the issuer shall register the transfer as requested if:

(1) Under the terms of the security the person seeking registration of transfer is eligible to have the security registered in its name;

(2) The indorsement or instruction is made by the appropriate person or by an agent who has actual authority to act on behalf of the appropriate person;

(3) Reasonable assurance is given that the indorsement or instruction is genuine and authorized (section 400.8-402);

(4) Any applicable law relating to the collection of taxes has been complied with;

(5) The transfer does not violate any restriction on transfer imposed by the issuer in accordance with section 400.8-204;

(6) A demand that the issuer not register transfer has not become effective under section 400.8-403, or the issuer has complied with section 400.8-403(b) but no legal process or indemnity bond is obtained as provided in section 400.8-403(d); and

(7) The transfer is in fact rightful or is to a protected purchaser.

(b) If an issuer is under a duty to register a transfer of a security, the issuer is liable to a person presenting a certificated security or an instruction for registration or to the person's principal for loss resulting from unreasonable delay in registration or failure or refusal to register the transfer.