Okla. Stat. tit. 57 § 530.2
Within three (3) days after entry into the custody of the Department of Corrections, every inmate shall complete a notarized form provided by the Department of Corrections designating the name and address of any person who is to receive the personal property of the inmate held by any state correctional facility if the inmate dies. Each inmate shall have the opportunity to change the designation if he or she desires. In the event of the death of an inmate, the Department of Corrections shall deliver all money and personal property found within any state correctional facility belonging to the inmate to any person designated pursuant to the provisions of this section. In the event the inmate's designee declines to accept the inmate's remains and the Department of Corrections pays for cremation, the costs of the cremation shall be deducted from any balance due to the inmate's designee.
Okla. Stat. tit. 57, § 530.2