Okla. Stat. tit. 12A, § 12A-8-307: Purchaser's Right to Requisites for Registration of

Transfer.

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.