Mississippi Code
Part 4 - . Registration
§ 75-8-402. Assurance that indorsement or instruction is effective

An issuer may require the following assurance that each necessary indorsement or each instruction is genuine and authorized:
An issuer may elect to require reasonable assurance beyond that specified in this section.
In this section:
"Guaranty of the signature" means a guaranty signed by or on behalf of a person reasonably believed by the issuer to be responsible. An issuer may adopt standards with respect to responsibility if they are not manifestly unreasonable.
"Appropriate evidence of appointment or incumbency" means:
In the case of a fiduciary appointed or qualified by a court, a certificate issued by or under the direction or supervision of the court or an officer thereof and dated within sixty (60) days before the date of presentation for transfer; or
In any other case, a copy of a document showing the appointment or a certificate issued by or on behalf of a person reasonably believed by an issuer to be responsible or, in the absence of that document or certificate, other evidence the issuer reasonably considers appropriate.