Okla. Stat. tit. 12A, § 12A-3-203: Transfer of Instrument; Rights Acquired by Transfer

TRANSFER OF INSTRUMENT; RIGHTS ACQUIRED BY TRANSFER

(a) An instrument is transferred when it is delivered by a

person other than its issuer for the purpose of giving to the person

receiving delivery the right to enforce the instrument.

(b) Transfer of an instrument, whether or not the transfer is a

negotiation, vests in the transferee any right of the transferor to

enforce the instrument, including any right as a holder in due

course, but the transferee cannot acquire rights of a holder in due

course by a transfer, directly or indirectly, from a holder in due

course if the transferee engaged in fraud or illegality affecting

the instrument.

(c) Unless otherwise agreed, if an instrument is transferred

for value and the transferee does not become a holder because of

lack of indorsement by the transferor, the transferee has a

specifically enforceable right to the unqualified indorsement of the

transferor, but negotiation of the instrument does not occur until

the indorsement is made.

(d) If a transferor purports to transfer less than the entire

instrument, negotiation of the instrument does not occur. The

transferee obtains no rights under this article and has only the

rights of a partial assignee.