Okla. Stat. tit. 62, § 474

Each and every warrant or certificate of indebtedness must be drawn against a specific appropriation or specific amount authorized by a bond issue for such purpose. As soon as said warrant, certificate of indebtedness or a bond is issued, the same shall be at once signed and delivered by the clerk to the treasurer of the county, city, or town, excluding a school district treasurer, issuing the same for registration.