2012 Pennsylvania Consolidated Statutes
Title 13 - COMMERCIAL CODE
Chapter 83 - Transfer of Certificated and Uncertificated Securities
Section 8307 - Purchaser's right to requisites for registration of transfer

     § 8307.  Purchaser's right to requisites for registration of
                transfer.
        Unless otherwise agreed, the transferor of a security on due
     demand shall supply the purchaser with proof of authority to
     transfer or with any other requisite necessary to obtain
     registration of the transfer of the security, but, if the
     transfer is not for value, a transferor need not comply unless
     the purchaser pays the necessary expenses. If the transferor
     fails within a reasonable time to comply with the demand, the
     purchaser may reject or rescind the transfer.